Here's the biggest problem with no taxes=no vote. 50% of America pays 90% of the federal income tax burden. While this may somewhat roughly align with the voter turnout in some recent elections, half of america would control the other half. I personally like to see low voter turnout because it make my vote count for more, but "buying" that would not appeal to me. As far as changing the tax structure goes, a flat tax would be fairer because people with more money would spend more and pay more taxes. And no, you couldn't just go to another state to avoid paying NATIONAL sales tax. The same tax would be levied there too. Check out this link. (It is an excel spreadsheet so hope you've got excel). The last set of figures deals with % of total tax burden
http://www.irs.ustreas.gov/pub/irs-soi/00in01rt.xls