Actually that's not quite how it works. Insurance companies, doctors offices, hospitals and other providers have set contracted rates.
There are several different ways that contracts are negotiated that includes all of the supplies,the actual cost of the facility,and also your room and board charges. Typically the insurance company will never pay more than what their contract will allow and that's also determined by what was authorized.
Its kinda confusing but I've been in the medical field my whole career, and this is what I do on a daily basis . I'm a glutton for punishment lol
But I do tend to agree that the cost of Healthcare has skyrocketed which then makes the patients responsible for more out of pocket.