That's because the monopsony of universal health care fixes the prices. We're kinda caught in the middle in the US.
Cheaper, universally accessible, and same outcomes seems more efficient, yes?
That said: https://cepr.net/publications/can-we-just-admit-were-wasting...
> Traditional Medicare has significantly lower administrative costs than private insurance with 1.1 percent of spending in 2024 going towards administration compared to between roughly 12-18 percent for private insurers in previous years. Coincidentally, the bloated administrative spending of American health care is one of the factors contributing to why the United States spends around twice as much per person compared to other developed nations even though we have worse health outcomes.