The consumer would benefit from a higher quality of games, since they would become more lucrative to make and the available budget after a successful title would be higher.
There’s also the indie scene that would benefit from every dollar. A 30% middleman tax can affect a lot more than just the price.
Cutting ceo pay is a good idea too but one problem doesn’t forgive another and regulating soft monopolies would be a first step in that direction anyways.