I'd go along with that, except that nobody, no matter how wealthy, should have to pay a higher tax rate than the poorest. Why bother to make yourself successful with finances, if you will just get into a higher tax bracket and actually have less money than if you made less in the first place? 10% flat tax for everybody... Of course Buffett wouldn't go for that since he'd be paying a lot more than he is. But most normal people would be paying less with 10% flat.
Charles