Farm (revenue leasing)

Farming or tax-farming is a technique of financial management in which the management of a variable revenue stream is assigned by legal contract to a third party and the holder of the revenue stream receives fixed periodic rents from the contractor. It is most commonly used in public finance, where governments (the lessors) lease or assign the right to collect and retain the whole of the tax revenue to a private financier (the farmer), who is charged with paying fixed sums (sometimes called "rents", but with a different meaning from the common modern term) into the treasury. Sometimes, as in the case of Miguel de Cervantes, the tax farmer was a government employee, paid a salary, and all money collected went to the government.
Farming in this sense has nothing to do with agriculture, other than in a metaphorical sense.
Etymology.
There are two possible origins for "farm".
Derivation from classical Latin.
Some sources derive "farm" with its French version "ferme", most notably used in the context of the Fermiers Generaux, from the mediaeval Latin "firma", meaning "a fixed agreement, contract", ultimately from the classical Latin adjective "firmus", "firma", "firmum", meaning "firm, strong, stout, steadfast, immoveable, sure, to be relied upon". The modern agricultural sense of the word stems from the same origin, in that a medieval land-"holder" (none "owned" land but the king himself under his allodial title) under feudal land tenure might let it (i.e. lease it out) under a contract as a going concern (not as a sub-infeudated fee), that is to say as a unit producing a revenue stream, together with its workers, livestock and deadstock (i.e. implements), for exploitation by a tenant who was licensed by the contract, or "firma", to keep all the revenue he could extract from the holding in exchange for fixed rents. Thus the rights to the revenue stream produced by the land had been farmed by the lessor (therefore strictly perhaps the "farmor") and the tenant became the "holder of the farm", or to coin a word, "farmee". Because this was the form of the farming transaction most known to popular society, the word "farmer" became synonymous with a tenant of an agricultural holding.
Derivation from Old English.
According to other sources, the word "farm" comes from Middle English "ferme" ("farm, rent, revenue; revenue collected from a farmer; factor, stewardship, meal, feast"), from Old English "feorm, farm" ("provision, stores of food, supplies, possessions; provisions supplied to the king or a lord by a tenant or vassal; rent, feast, benefit, assylum"), from Proto-Germanic *"firmō, *firχumō" ("means of living, subsistence"), from Proto-Indo-European *"perkwu-" ("life, strength, force"). It is related to other Old English words such as "feormehām" ("farm"), "feormere" ("purveyor, grocer"), "feormian" ("to provision, sustain"), and "feorh" ("life, spirit"). The Old English word is stated by these sources as having unusually been borrowed by Medieval Latin as "firma" or "ferma" and to have provided the Old French "ferme" "farm", Occitan "ferma" "farm". This is refuted by those sources which state "firma" to derive from classical Latin "firmus". The word continued the same senses of "rent, farmed office, source of revenue, feast". The meaning "rent, fixed payment", which was already present in the Old English word, was further strengthened due to the word's resemblance to the unrelated (so say these sources) Latin "firmus" ("firm, solid"), and "firmitas" ("security, firmness").
Valuation of a farm.
The tenant of a farm can only make a profit if he makes a careful assessment of its value. Although modern financial management theory has reduced such calculations to scientific formulae, the mind of the astute financier of past ages would have well understood the calculations involved, whether they were performed mentally or by making marks in the sand. An estimate is made of the long-term average yearly gross value of the revenue stream in question, which can be derived from examination of past records and accounts, adjusted for any new circumstances affecting the future. Then a discount for a risk element is deducted with a further discount deducted for the time value of money. The risk in question relates to the possibility of some of the debts forming the revenue stream being defaulted on or paid late. This causes variability in the revenue stream. The resultant figure forms the maximum rent the tenant is willing to pay to the lessee of the farm. His profit becomes the excess of whatever revenues he can extract from the farm less the rents payable, less his administration, levying and collection expenses. The skill of the tenant of a farm is therefore firstly in negotiating a favourable rent which he does by overstating the riskiness (variability) of the cash flow stream in question and secondly in his management of the debts thus assigned to him, that is to say his skills as a debt-collector and manager in general. He must also be satisfied that he has the ability to enforce payment of the debts, ultimately by use of a court of law, in which he must pay the standard fee for bringing a suit, under the legal system generally instituted by the government authority which is the lessor of the farm. He does not act as the lessor's agent but as a principal.
Historical use.
Roman Empire.
Tax farming was originally a Roman practice whereby the burden of tax collection was reassigned by the Roman State to private individuals or groups. In essence, these individuals or groups paid the taxes for a certain area and for a certain period of time and then attempted to cover their outlay by collecting money or saleable goods from the people within that area. The system was set up by Gaius Gracchus in 123 BC primarily to increase the efficiency of tax collection within Rome itself but the system quickly spread to the Provinces. Within the Roman Empire, these private individuals and groups which collected taxes in lieu of the bid (i.e. rent) they had paid to the state were known as "publicani", of whom the best known is the disciple Matthew, a "publicanus" in the village of Capernaum in the province of Galilee. The system was widely abused, and reforms were enacted by Augustus and Diocletian. Tax farming practices are believed to have contributed to the fall of the Western Roman Empire in Western Europe.
Feudal England.
Medieval English kings frequently made grants "in fee-farm", a form of feudal tenure. An example is the following writ of King William II (1087–1100) granting a hundred court to be held in fee-farm by Thorney Abbey:
William, king of the English, to all the sheriffs and barons of Huntingdonshire, greeting. Know that I have granted the Hundred of Normancross to the abbot and monks of Thorney to be held in fee-farm for an annual rent of 100 shillings which I order them to pay to my sheriff at Huntingdon. And I forbid any of my officers to do them injury or insult in respect of this.
Medieval Egypt.
The Chief Rabbi of Egypt, Sar Shalom ben Moses was accused of tax farming, which led to his excommunication by Maimonides. 
Other uses.
Besides the Romans, historical examples include the tax collection methods of the Ptolemies, Seljuks, Mamluks, Ottomans, the French State prior to Louis XVI (see ferme générale), and Russia prior to 1862 and the Dutch East Indies (see pacht) prior to the twentieth century. In many cases, such as the Abbasid practice of Iqta, these rights were granted by an authority, in this example the caliph, for services rendered or promised. In the Byzantine "pronoia" system, similar rights were often purchased from the crown. Though such arrangements in some respects seem similar to the feudal system, there are significant disparities, including continuance of state power and, at least in the case of "pronoia", theoretical time limits on the grant. In many cases, including those mentioned, tax rights were not transferable or divisible, unlike feudal fiefdoms.
Advantages.
Tax farming was an important step in the history of economic development by providing a method for collecting taxes across a large area without the need for a tax-collecting bureaucracy, or during periods when such a bureaucracy is unworkable or impossible to maintain. Systems of tax farming similar to the Roman model were used in Ptolemaic Egypt, various medieval Western European countries, the Ottoman and Mughal empires, and in Qing Dynasty China. As states become stronger, buoyed up by revenues brought in by tax farming, the practice was discontinued in favour of centralized tax collection systems. In part this was because tax farming systems tended to rely on wealthy individuals outside the state machinery, gangs, and secret societies.
Disadvantages.
The key flaw in the tax farming system is the tension between the state, which seeks a long-term source of taxation revenue, and the tax farmers, who seek to make a profit on their investment in as short a time as possible. As a result, tax-farmers often abuse the taxpayers in various ways, tending them to switch their economic activity from strategic long-term projects to short-term revenue generation. A common abuse by tax farmers is the undervaluation of goods received in lieu of taxes, allowing the tax-farmer to re-sell the goods to create a second profit source. Such abuses stifle economic growth by restricting the ability of the tradesman to reinvest in his business, thereby limiting the quantity of taxes generated over the long-term.
The obvious disadvantage of this process, as with all forms of usury, is that the tax collector is inserting himself in a transaction to make a profit at the expense of the borrower (taxpayer). This creates a serious conflict of interest. For example, lending money at interest was generally frowned upon during most of recorded human history, however tax or rent was acceptable. Therefore, once the lending of money through banks was formalized by the governments, then tax collection must have been included to pay the national debts that make fractional reserve banking work. So we went from governments selling the right to "tax" to private people (whether feudal or mercantile) to allowing the same group to create money to lend to the government (for free of course) and then the government must collect taxes to repay the debt and support the currency. 
Therefore, the single biggest issue with tax farming or fractional reserve banking is, as noted above, the distortion of pricing. As we see from our own economic situation, when price of houses, cars, stocks are tied to money lending, the price of these goods is no longer a function of supply and demand, but of financing approval. As with tax farmers who artificially discounted goods provided in kind, we have the same issue with distortion of prices for these goods. 
Now one might argue that paying a "little" extra for a house or car is not important to the economy. Further, anecdotally we know the price of shelter, food and other expenses and taxes have remained at roughly 1/3, 1/3 and 1/3 for 2000 years or so, however, we routinely see these ratios changing because the prices of these goods is not tied to their utility, or even their intrinsic value, but to what the bankers and tax collectors say it is. More importantly, in a "free market" economy, if the price of something is off, it throws everything else out as well. For example, most of the major recessions of the last 100 years is tied to either an unexpected price shock (oil crisis, dot com bust) or a banking breakdown. These are the "market's" reaction to mispricing assets like houses and cars. Therefore, it is not about short term vs long term investments, but about long term incorrect pricing to profit the (feudal or banking) aristocracy.
Modern-day tax farming.
Indian sub-continent.
In Bangladesh and India tolls on bridges and roads and dues from public properties such as lakes and forests are often leased to private persons or firms.
Disambiguation.
Privatized tax collection.
Tax farming is not synonymous with modern privatized tax collection, where private individuals or companies collect taxes and pass them to the state in return for a commission or fee, without bearing any risk consequent of default by the taxpayer. Tax farming is speculative, meaning that the tenant of the farm bears the full risk of defaulted debts. In addition, a tenant is often required as a term of the lease to make an early rent payment, which must be financed from his own resources until the revenue stream subject to the farm has started to be collected.
Factoring.
In the United Kingdom, some tax collection of "lower value debts" by HMRC has been outsourced to debt collection agencies from July 2010. However, debt collection agencies, like invoice factors, are not truly farmers of revenue streams, as they do not bear any risk of default. Rather they make loans in expectation of future receipts, such loans being always recoverable and secured on the income stream itself.
Simple commutation.
In 1999 the National Board of Revenue in Bangladesh (NBR) negotiated with cigarette producing firms a minimum amount of Value Added Tax (VAT) that should be paid per month even though VAT is an "ad valorem" tax, that is to say of variable yield. The NBR took this step because under the self-clearance system monitoring of production and sales of cigarettes proved to be difficult. It was agreed that if the cigarette producing firms paid the minimum revenue fixed by the NBR, physical monitoring would be withdrawn. The NBR resorted to this technique of financial management to avoid the large costs of monitoring while gaining more in revenue with certainty.