Residency slots are not capped. Common misconception.
Private parties are welcome to create and fund residency slots if they want. They typically don’t because it’s a totally nonsense investment — perfect example of a problem that private investment markets would fail to solve.
The “cap” refers to the fact that CMS doesn’t fund an infinite number of residency slots.
So you and I are saying similar things, which is that the government needs to fund more MD training.