Wow a synopsis would be nice.
So you are curious as someone seems to choose to reside where his tax bill is, or could be higher than it would be elsewhere.
I suspect only he can tell you what his motives are but (assuming no kind of tax loophole you've missed) I'd suggest one possibility might be:
Instead of considering the situation as, it's his money, that, that nasty government keeps demanding it, and he needs to fight back and limit how much; that instead he has a sense of community, realises that the government has no money but is simply managing the public's communal kitty, and wishes to do right by his fellow citizens by adding a little more for needed public projects and services, as he can afford it.