Projects based on a Proof of Stake algorithm have tackled many of the scaling issues of PoW by achieving better latency with less computation, bandwidth and storage.
Scalability in terms of computation is determined by the amount of time it takes to verify transactions and their signatures which has nothing to do with PoW and is not improved by PoS.
Scalability in terms of bandwidth and storage is affected by transaction size and has nothing to do with PoW and is not improved by PoS.
thing is you need a blockchain for keeping a copy of valid transaction details on and removing invalid or bogus transactions, now pow is a great way to reward as better answer of a question created before every block starts and miners use their computational resources to get to a most suitable answer out of almost infinite answers. proof of stake verifies just by looking at someone and if someone has more money it rewards him. sometimes even poorer people get rewarded I agree but poor will never become rich using pos.
so, I am on the pow side ASICs are similar to having huge weight in your staking wallet.