Value Added Tax
For when you confront your Republican uncle during the holidays.
People everywhere hate taxes. What makes the United States distinctive, I think, is our insistence on collecting so much of our tax revenue in a distinctly unpleasant way. No stealthy value-added taxes for us! We're going to do it the hard way.
The VAT works well in nearly every other developed nation and it can work just as well here. It would replace our current, complicated and frustrating sales tax system with something much more simplified.