so, if you don't need taxes to fund services, why is it such a struggle to get services?
this isn't an argument about resources.
it's ideological.
services providers make more money when services are private. some people think services are better when they're more expensive and/or private. and, there are fascists out there that want you to work hard to pay for your health care.
reducing the issue to a debate about the budget is actually conceding the issue on two levels. first, it constrains the debate to an acceptable discourse in the neo-liberal paradigm - this is a debate that conservatives like to have, because it's about accounting, rather than about ideas. second, it concedes that services are expensive, and we have to make sacrifices to have them - despite the fact that government services are actually more efficient, and there's no reason we have to sacrifice to have them at all.
if you let them define the terms as an accounting debate, you're going to lose this argument. and, so, you might wonder if that's why you're being herded into it.