This is not quite the same since it is not about freedom of movement but instead about economic control, but is an interesting comparison: the US charges its citizens income tax even when they are not resident in the US, and it is the only country that does this, IIRC.

If you leave the US and immigrate elsewhere, the only way to stop paying for the US’s militaristic imperialism is to renounce your citizenship.

Maybe you find this essay has some useful ways to think about it: https://redsails.org/china-has-billionaires/

It quotes from mainstream media sources to support the charge that the communist party keeps their reins on the billionaires in a way that just doesn’t happen in capitalist countries, with an eye towards long term goals.