[temphn]

When the United States stops spending its tax revenue bombing third world countries, maybe then you'd have a moral argument. Till then it's the duty of all right thinking people to minimize their collaboration with the federal government.

[andrewem]

This was more or less Thoreau's argument in his essay Civil Disobedience (1). He concluded that the US was acting immorally in its war in Mexico and therefore he didn't pay his poll tax. They locked him up overnight, and then his aunt paid his tax and he was let out.

Some people conclude that those who collaborate with the federal government are evil and therefore deserving of arbitrarily bad treatment, and that's what gets you terrorists and violent anarchists and so on. Also, one looks in vain for the government which always behaves ethically and can be relied upon to continue doing so which one ought to be supporting instead.

(1) http://en.wikipedia.org/wiki/Civil_Disobedience_(Thoreau)

[mseebach]

But it does remove the moral imperative to not plan your taxes such that you pay the minimum possible amount legally.