Your suggestion would cause so many headaches for retailers it’s incredible. Do you know the type of paperwork one needs to fill out to purchase something tax free? It literally takes an extra 5-10 minutes of an employee’s time to fill out these forms. Your solution would add to the retailers cost and drive inflation even further (they would probably have to hire extra cashiers just to deal with the paperwork for those who would opt out...).
If you then say that they could computerize the systems — do you have any idea how much money it would then cost the retailers to implement these changes?
I’m not afraid of progress, or change if it’s a GOOD idea... But, this I’m afraid is definitely NOT a good idea.
Blah blah blah...