A better solution would be to get rid of most are all write offs and if you did that you could cut tax rates a fair bit and still get more.  The top marginal rate is 39.6%, but the average person in the top 1% pays significantly less than this.  Say the average person pays only 22%, if you cut it to 30% but disallowed all write offs you would get more revenue with only those not using write offs getting a tax cut.  Off course I don't expect this to happen, but just saying.  Also if you ended tax deductions from state and local taxes you could cut the top rate to mid 30s and be revenue neutral depending on which state you lived in.  California has a top rate of 13.3% so if deductible it comes to 47.6% but if you cut to 35% without deducting state taxes it would be 48.3%.  Off course in some states it would drop.