The average citizen has zero say in whether or not they can get away with not paying taxes (even if you've got the best lawyers in your corner, the government will do everything they can to try and jail and/or destroy you)

That being said, the level of hard evidence required in order to prove that somebody is aware of their government's worse crimes and is still paying taxes because they want to fund said government in an attempt to allow said government to still commit those crimes, liability becomes a really tough proof at that point.

Let's invent a fake country named Bidentopia. Bidentopia actively commits atrocities like human, drug, and sex trafficking. The average citizen of Bidnetopia knows the government does some bad things, but has no idea who is actually in charge of said horrible things. Which means most of them aren't liable.

Now, let's say that you have an elitist class that funds the government, endorses the government, uses their journalism to hide the government's evils, etc. Well, now you've got a group that could be seen as liable.