How about a fair tax to cover MC and SS and a tariff to cover discretionary spending? win-win. No more income tax.
Why not, since you agree that the FAIRtax deals nicely (AND FAIRLY!) with SS and MC, have FAIRtax raise ALL government revenue?
Then, tariffs could be devised to punish/reward our trading partners and domestic businesses, which, if I recall correctly, was their purpose in the first place?