Why doctors in America earn so much

TLDR: the article claims it’s a closed market geared at profiting a small group of surviving insiders.

More than 100 million people today live in an area without enough primary-care doctors (the problem is particularly bad in rural areas)

And:

Nurse practitioners and physician assistants have been given responsibilities typically reserved for doctors, such as writing prescriptions. Foreign-trained doctors have filled some of the gap too.

Yet, the length of training and the cost of becoming a licensed doctor in the US makes it impossible for many.