Your example oldsters are going to pay taxes if they spend under the present system in the form of embedded tax costs which have the effect of boosting prices over what they would be without taxes. The effect on prices is something like a bump of 20-25% over what it sould be with the FairTax so that, in effect there is little or no difference in costs to them.
In addition, with the FairTax they will be receiving the prebate and their S/S check will not be taxed either.
So, are you saying that the old-timers if they take their $1000 to the mall, they will have the same purchasing power as before the FairTax, on average? They'll be able to buy about the same amount of stuff with their saved dollars?