Questions about POS versus POW

RN I GPU mine ETH as POW like everyone else, in a pool. When this moves to POS, to go "green," won't this simply make the rich richer? The idea of needing to stake 32 ETH means that you have to have a LOT of money to stake, or potentially stake in a pool. Is that even a thing? Would the pool then need to have your ETH as an asset? That all seems like a bad idea. Thoughts?