For those individuals who pay 0 in taxes, they still don't recoup their FICA and SS contributions, by eliminating both and replacing it with a 9% income tax they would be saving 6% off the bat in FICA alone.
Absolutely not, the tax credit they get form the minimum earned tax would make up for all their FICA payment.
Untrue.
15% is both the employer side and employee side. Only the 7.5 employee side is a guaranteed savings to the employee. The employee half is presumed behavior.
By the way I agree with Beagle8u’s comments and I don’t understand why you attacked him/her. For retired folks who will not get the benefit of the reduced Fed Income Tax, it may very well be a increase because of the Fed Sales Tax. In that sense it is very redistributive to retirees with savings.