No. Introducing a sales tax just opens another revenue stream. Soon enough 999 will become 101010... and so on infinitely.
As an interim position, perhaps, leaning toward pure fair tax... but then there is nothing to keep a later congress on the path of removing all other revenue streams...
Cain’s economic plan is 2 phases.
999 is a (1-2 year) bridge to the repeal of the 16th and Fair Tax. The rates can only be changed by 2/3 majority vote
This will put more on Congress than are already there now with the current tax system.
Plus, with everyone paying, no special treatment, no tax loopholes, pressure will be enormous not to change these rates.
No sales tax on used goods.
9% income tax replaces FICA (15% or half whichever way you look at it) and it is minus gifts to charity. If you don’t like giving your money to government give it to the church.