Well, I believe that the idea of tax is fundamentally immoral. It involves taking something away from somebody that they deserve. But, then again, it actually pragmatically is a pretty good idea, and if you had a choice between using government services and paying tax, or not using them and not paying it, you would choose to use them, because they do include things like roads. If you had a choice when filing a tax return to check a box that says:
I choose not to walk on any publicly owned property including pavements and roads, to not expect that I or any of my dependants be protected by the law, not to use the government health care, fire service, education, government funded university places etc. etc. Then I don't think many would choose not to pay tax.
That is why I am not actually contradicting myself. You can already check that box by declaring your home as an independent state, and then I don't think the government should stop you.