Fun fact, the American Medical Association artificially limits the number of doctors that can go through residency programs each year. The limit is actually lower than the number of medical school graduates, forcing some small number of new doctors to leave the country because they aren't allowed to become licensed.
We should be aggressively recruiting and training folks to go into the medical professions, and paying for their training so you don't have to go into huge debt to become a doctor.
A reasonable percentage may consist of immigrants who qualify to practice in their native countries but do not in America. I think that’s a thing.