I guess people who don't own cars also don't buy goods. You know, goods shipping on the very roads you don't want your tax money spent on. I also guess you don't see a benefit to having a military that can response to invasions on american soil quickly by using, you guessed it, the very roads you don't want to pay taxes for. Roads are used for everyone, drivers and non-drivers alike. Shut them down and watch the entire economy collapse in a matter of days.