voluntaryists are for government

Well this is where we get into a more semantical argument. Is a voluntary association a government? It technically doesn't govern or rule over you for it's entirely voluntary. That's the foundation of it.

You'd pay taxes to who you choose to pay taxes to.

Again, a semantics argument. It wouldn't be taxes at that point, it would be a bill for it's entirely your choice to engage in getting certain services. I'm not being "taxed" when I go fill up my car, I'm paying for the goods and services I have asked for. And really, this mentality is of treating payment and taxes the same is ultimately what leads to ideas like "The Social Contract" that nobody ever agreed to but we are for some reason beholden to.

voluntaryists are for government

Well this is where we get into a more semantical argument. Is a voluntary association a government? It technically doesn't govern or rule over you for it's entirely voluntary. That's the foundation of it.

You'd pay taxes to who you choose to pay taxes to.

Again, a semantics argument. It wouldn't be taxes at that point, it would be a bill for it's entirely your choice to engage in getting certain services. I'm not being "taxed" when I go fill up my car, I'm paying for the goods and services I have asked for.