I never thought of it this way, but economist Dean Baker, writing in Business Week, points out that the current tax rule permitting private equity fund managers to pax taxes on performance-based fee income for services at the capital gains rate is tantamount to a special tax rate for one profession.
Despite the many areas of dispute among economists, virtually all of them would agree tax rates should not vary by occupation. In other words, we don't want to see one tax rate for firefighters, a different tax rate for schoolteachers, and a third tax rate for bookkeepers...