I say this as a physician who incorporated upon arriving in Nova Scotia from a previous post where I was a true civil servant...Canadians and physicians do overestimate the taxes they pay and will pay. As a soon-to-be unincorporated physician, I can still:

- put up to $26 000/year into an RRSP, significantly reducing my tax bill
- use a TFSA to encourage further tax-free savings
- Benefit from the RESP to get $7200/child + tax-free investment growth 
- still deduct most "business-related" expenses from my gross revenue and taxable income
- if reasonable, still pay my spouse a modest salary e.g. for book-keeping
- save up to $3500 in accountant and legal fees incurred via incorporation. Indeed, I encourage my fellow physicians to do their own tax returns - it isn't difficult and one acquires some financial literacy in so doing.
- pay into the CPP. Contrary to myths, it isn't going anywhere and serves as a reliable source of retirement income in volatile markets.