Even if they have an extradition treaty it only apply to crimes which are actually crimes in both countries. So most political "criminals" couldn't be extradited anyway...
> diaspora wealth, knows it's misbegotten, and can't survive politics of formal extraditing
So prosecute them for any crimes they committed in your country? I mean the Chinese government is thoroughly corrupt so the fact the they want to arrest certain people and not others is not a great indicator on which wealth is "misbegotten"...
> told of personal and extended consequences
Right.. like how much their families will suffer it they won't return. The Soviets were using the same tactic on political dissidents to shut them up,
> capital controls is that virtually every PRC ex-national with a decent amount of assets abroad didn't get it there legally
Safeguarding the capital control laws of the PRC should be something anyone cares about why exactly?