no more than PoW. they're both essentially lotteries that hand out share/influence based on capital investment.
PoS, done right, simply emulates PoW.
what does PoS done right look like?
"miners" lock up funds for 1-2 years. the amount of funds they lock up determines how likely they are to win the block lottery. the block lottery, and locking up funds for entries within it, remain decentralized.
the challenge is running a decentralized lottery with distributed consensus. this is hard, but i don't think impossible.
