With proof of work there is a clear separation between the hardware investment and the proof of work nonce. There is no way to trace back the nonce to the hardware and thus the miner (note: not the reward address) can’t be held accountable because of plausible deniability.
However with proof of stake, the block producer is selected based on identity tied to a stake on chain. This stake can be traced and thus made to be tainted if the block producer doesn’t comply with regulations from a powerfully entity.
How is Casper going to resolve this?
IMHO there’s absolutely no need to resolve this. Actually, that’s one of the advantages of PoS over PoW. To make things better, the stake of a dishonest validator is “slashed”, i.e. burned (even worse than tainting buahaha ). Slashing conditions are baked into the protocol, so there’s no “powerfully entity” that can influence this process. This all is impossible to do in PoW (you cannot slash ASICs of a dishonest Bitcoin miner ).
On the other hand, speaking of censorship of miners/validators by outside entities (e.g. governments), both the PoW miners and the PoS validators can be anonymous, and can even protect their IP addresses if needed. But, PoS has a big advantage here, too - there is no expensive hardware that is hard (sometimes even impossible) to hide and/or relocate. If you have a big ASIC farm in a certain country, the local government can easily locate/confiscate it and even put you in jail (we’ve seen that happening in Venezuela recently). If you are a PoS validator, it’s extremely hard for a government to locate/confiscate your wallet.
Hope this helped!
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