> Existing miners can't do this in a PoW system

Sure they can. It's easy to only mine on top of blocks from certain sources, and if most of the network does this then those are the only blocks that matter.

You can mine anonymously, you can't stake anonymously.

But my comment is about whitelisting, not blacklisting. The ability to be anonymous won't stop whitelisting.

Sure but the difference with mining is that having a majority of hashrate doesn't allow you to maintain that majority in perpetuity. You have constant operating expenses that require you to sell your Bitcoin, along with constantly growing competition. Just look at the rise and fall of large Bitcoin miners. With PoS if you are the biggest on day 1 you will probably be the biggest on day 1,000.

It might mathematically keep you in charge forever, but if you can stop almost anyone from being able to profit then it's very unlikely people will invest enough to override you.

And the motivation not to do it is the same, people will get mad and stop using the grossly manipulated coin.

>See my comment to another in the thread. Existing stakers can prevent new people from staking

There is little to no evidence of this. Completely unsupported conspiracy theory.

New people can still vote for their governments to affect those systems.

The distinction feels irrelevant

It's very relevant. Mining is very easy to geographically diversify. PoS coins will almost all be controlled by US based custodians subject to US regulations. PoS coins will be controlled by the US financial industry at the end of the day

This is completely false, late/end game PoW centralizes mining around the cheapest electricity. It is impossible to mine profitably in the overwhelming majority of the world now.

Your government controls which coins you are able to use.

It doesn't matter if the coin becomes run by another geographic area if it's illegal for you to trade in them