Mayo is also salary-based. There is an argument (and a strong one) that salary-ing doctors is a good, good idea, because if you pay them by patients seen or by tests/etc proscribed, they will do things that are financially good for them, but wasteful or even unhelpful to health, live over-proscribe testing, not spend enough time to really understand a patient’s problem, etc. Mayo can afford to pay large salaries to its doctors because it saves a lot of money by not running millions of needless tests.