With the flat tax, don't forget to add payroll taxes onto the flat tax quoted rate as those are in addition and not eliminated.
The more I read about both the flat and consumption tax.... the more I think I like the current method. You know... I understand the current one pretty good. I do a good job of minimizing my tax burden. If we could just tweak the current one a little .... like .... 1) eliminate the tax on mandatory IRA distributions (I manage the estates of mine and my wife's parents) ..... it's bad enough that you have to take a distribution, but then forcing the tax is unfair. 2) Eliminate capital gains taxes on anybody over 65. And ... 3) create an annual tax credit for anybody who pays off their home (wife and I paid ours off this year)...... this encourages people to be fiscally sound and to avoid the "cashout some of your equity" trap.