I realize how difficult this sort of thing is for you, but how about
studying this paper to get your answers.
Most of us are tired of leading the horse to water in your case.
"Having said this, let me hasten to say that my political presumptions have as much professional basis and claim to acceptance as Bartletts,
which is to say none. Rather than make what boils down to religious arguments about what will or wont happen in the political arena we economists should, I feel, evaluate the FairTax at face value. I.e., we economists should keep to our knitting and leave others to read political entrails."
Well, this is certainly encouraging. Where's the freaking science?