[byrneseyeview]

If I live off of my savings, and generate no taxable income, am I also immoral for driving on roads? What if I work part-time, but pay less in taxes than the average person? Once you have a theory that it's morally wrong for people not to pay taxes given that they benefit from the government, you run into the problem that the most effective tax avoidance scheme, by far, is to not have anything taxable.

Oddly enough, New York has implemented an effective Henry George-esque tax system: to merely exist in the city, you have to live in fairly pricey real estate, and the taxes your landlord pays are effectively passed through to you by market rents. Other places have much cheaper real estate, so they don't have the same dynamic.