Martin Feldstein supports cutting "tax expenditures," -the special purpose deductions such as the deductions for mortgage interest, charitable deductions, state and local government taxes and other such exemptions- as Bowles-Simpson Deficit proposals have recommended. Bowles-Simpson would use this money to reduce tax rates and only $80 billion of this to reduce the deficit. Here Feldstein suggests capping the individual's benefits from such deductions at 2% of adjusted gross income. Research by Feenberg and Feldstein on the use of such a cap shows that this would reduce the federal deficit in 2011 by $262 billion or 1.7% of gross domestic product. The list of deductions used by Feenberg and Feldstein for these figures are: deductions for mortgage interest, state and local income and property taxes, charitable contributions, credits for dependent care, children and certain education costs, and the exclusion of employer payments for health insurance. Sunc a cap would not affect the 46% of taxpayers who use the standard deduction and would induce others to shift to the standard deduction. By doing so this will simplify the tax system and reduce economic inefficiency. Feldstein advises that Congress should include and individual cap on total benefits from tax expenditures in any program to tackle the deficit....