It's already been proven by members of the Left and the Right, that a 10% flat tax would nearly triple the federal income tax revenue taken in. It would increase the amount paid by the wealthiest (NOT Obama's idea of "wealthiest" who include McDonalds' managers in some states, but those with 7-figure incomes). It would reduce the amount paid by the upper-middle income people who run small and medium businesses. It would put all the accountants out of work, and it would reduce the need for the IRS work force by about 90%, so that's probably the true reason that flat tax isn't on the table.
Charles
I'd like to see a source for these numbers.
The last estimate I saw was in the mid-1990s, at the rate of Gov't spending in place at that time it would have taken a 25% flat tax to achieve revenue parity. Today it would be worse.
I think you are fucking hallucinating if you think that a 10% flat tax would result in revenue parity, much less an increase.