Some more taxes are a lot better than being disappeared with no due process whatsoever, or having huge amounts of your property seized with no due process. The rich benefit immensely from liberal democracy. The alternative is being forced to play all kinds of power-games with stakes a hell of a lot higher than the ones they deal with when they mess around with politics in democracies, and at a disadvantage if they’re foreign and those aren’t open, pluralistic societies.

Their worst-plausible-case in a liberal democracy (barring state collapse into something else) is they lose a teensy bit of their stuff. Nowhere near all of it.