There are three kinds of tax behaviour: compliance, which means you do things strictly in terms of the tax code; avoidance, which means you do things in accordance with the tax code as far as not not explicitly breaking the law, but taking advantage of "gray areas"; and finally, evasion, which is flat-out breaking the tax law.
And actually, given the amount of contempt I hold the business of the state in, I actually do not care if people "don't pay their fair share". They are simply not consenting to the extortion of their money with menaces.
Tax evasion, tax avoidance -- these are not immoral or criminal acts. They are, in fact, hugely moral rebellion against an arrogant, violent and unaccountable state. I would actively encourage you to fight every tax bill that comes your way, cheat every penny you can.
The state is not your benefactor or a protector or a distributor of largesse to the needy. It is a bloated, thuggish parasite that should be starved in every possible way.
Deny the arrogant, thieving scum their "entitlement" to the fruits of your labour.