You mean the thing when the ETH people are going to hand the power over the people with the most money? I'm sure this idea is deeply chilling to... venture capitalists, they're probably shaking in their boots.
With PoS the consensus chooses if they want to give up power and you can only gain decentralization if they choose to give it up.
A new institutional investor just needs to start hoarding that easily accessible liquidity and the biggest players in the space will need to give up their share or risk the price of the currency dropping to zero because it’s too hard to transact in it and therefore it’s no longer profitable to tie up 32 ETH and run validators.
"Actually both systems give power to those who are already wealthy" isn't the argument for democratization and decentralizations crypto believers apparently think it is.