there’s been much discussion here about how PoS does little to provide a decentralized monetary system since it appears to be built with the idea those with the most money should determine what the “truth” is
No, in PoW those with the most hashrate determine what the order of transactions is. Most of the world's computing power is in personal computers, so it is at least somewhat fairly distributed.
In theoretical terms, wealth can be turned into hashrate. In practical terms, most of BTC is mined on dedicated mining rigs by a relatively small number of players.