Oddly, the current bill already has ONE exemption for college tuition, which opens up the floodgate. Why not health expenses too?
By golly, how many loopholes can we come up with together? Worse, how many loopholes can 535 members of Congress?
That's not an exemption, however. College tuition was not taxed from the inception of the bill as it is presumed to be an investment in human capital.
Think of all the exemptions you like - but the tough part is getting them inserted into the language of the bill. This bill has huge grassroots support.
OTOH, the Armer/Forbes flat tax has little graassroots support and Forbes himself has said it is not revenue neutral. All of the flat tax plans also retain the payroll taxes, do not tax the illegal economy to any great degree, and have no provision to allow border-adjustability of taxes to help our exporters be more competitive in other countries.