Proof of stake takes the rent-seeking middleman mentality of our modern fiat economy and applies it to currency.

I also think a proof of stake economic model discourages investment because wealth holders have less incentive to deploy their capital productively if they can just earn a risk free return through staking.

Then you consider a coin like Ethereum where 70% of the supply was pre-mined and dolled out to early investors and insiders and you realize that their switch to proof of stake is downright unjust.

Proof of Work is a more equitable model.