The Payne study (a compilation actually) does essentially the same thing. MOST of it's so-called "costs" are really lost growth potential, not costs that help reduce prices if eliminated.Also, looking at the lost growth of the current system would only matter if there would be no lost growth under the FairTax, and there most certainly would be. You would have to somehow figure the difference in lost growth between the different tax methods.
In fact most of the studies referenced by the FairTax supporters are studies of the impact of taxation and government spending IN GENERAL and NOT studies of one form of taxation over another. The actual thesis of the Payne study is "don't tax and subsidize the same thing" because it's costly to tax and even costlier for the government to hand out subsidies. None of that has anything to do with the FairTax, per se.
What sort of "lost growth" do you envision under the FairTax?
And do you think it would be more or less than under the income tax system?