People forget their free market hero, Ayn Rand, berated corporate/business welfare more than personal support (she preceeded, the big spending changes for entitlements).   Tax avoidance is a PAID political action most of the time.     

Company(industry) A will claim a cost of business, say R and D, and then tell their political rep. that they could better compete against Company(industry) X, in a neighboring state, or nation, if they could just get R and D cost offset with tax relief.

Guess what.  R and D is a NORMAL cost of doing business.   If  We the People give out tax exceptions, it is a COST to all taxpayers   Losing tax revenue will increase your debt just as fast as a new spending program of the same value.

Thanks for the post Eldo.    Why more than one home has ever received mortage tax relief stuns me.  What was the purpose of the law?  It was to make personal home ownership possible for lower incomes.  It had nothing to do with million dollar condo's in Aspen.