It’s a complex problem because a lot of those hospitals are non profit, so they have zero incentives to have high margins because no shareholders to return money to. Higher salaries for executives though…
How the board gets approved to be elected is a bit self selected, but in theory it should be controlled by people that have incentives, the same as a public corporation.
Now this is an insurance company and not a provider network,some provider networks are more self owned.
They have no stock holders to pay, but the people running them will pay themselves multi million dollar wages if they can!