posted by jmogQO's idea is obviously out there, I'd be happy if there was a set/flat percentage once normal deductions for living are taken out (similar to the standard deduction now).
Say everyone pays 10% and that's it, period. The very low income would still pay 0 since the standard deduction would drop them to basically zero adjusted income.
I have wanted flat tax for awhile now. I doubt we ever see it. Too many businesses rely on a massive tax book and a flat tax would kill them.