Property tax!! It's the hardest to evade or starve the state with.  

Income tax is easy not to pay.  Just stop making money 

Inheritance is easily evaded with Bitcoin(don't leave your BTC to anyone😉)

Capital gains can be deferred by clever engineering 



But the tax that actually cotified our slavery to the USA is the exit tax.  Before that you could "just leave"(with our wealth) if you didn't like your masters.  After Bill Clinton we can't even do that