Yes. And US doctors make more "per capita" than Australian doctors. About twice as much. If they continue making more, I don't see how paying their billing rates from the taxes addresses the "affordability" problem. If you were to fix billing rates at a lower level (through single payer and such), you wouldn't really have any doctors to begin with, at least not for a while.

Doctors' wages aren't the biggest cause of higher spending. Admin costs and pharmaceutical spending are the largest (unnecessary) cost centers.

Citation needed. Most of _my_ medical bills go to the doctors.