Or they can increase the number of people going through medical schools. The AAMC understands the law(s) of supply and demand and doesn't want too many new medical doctors, then they would get paid less.

For reference, the number of students graduating from medical school is dropping:

https://www.aamc.org/download/321526/data/factstableb1-2.pdf

or we can just import foreign doctors like NHS does.