I don't understand why vertical integration is not made illegal. An insurer should not own a PBM or providers. They all should have an adverse relationship so they put cost pressure on each other.
Also, providers should charge the same prices for the same procedures no matter who pays. Ideally everybody should be mandated to follow Medicare prices. If these prices are too low to survive, then there should be a discussion about adjusting the prices.
The whole system is basically a huge bureaucracy that wastes a lot of money but some of the waste is enough profit for a lot of people to fight tooth and nail to keep the status quo.