It's not that straightforward. There is a shortage of CNAs, RNs, and LPNs willing to work in current conditions for current pay. Lower patient ratios and higher pay would naturally bring more labor into the healthcare labor pool. If you're going to import healthcare labor and still subject them to the existing suck that is US healthcare labor, that is not sustainable.
(light edits made to capture nuance vs absolutes, previous comment version started with "there is no healthcare labor shortage", which is not accurate)
Oh, it's perfectly sustainable. It allows wealthy hospital shareholders to continue reaping huge profits without having to improve conditions, wages, or staffing ratios. Unlike America, which has a finite supply of people willing to be nurses, we can simply hire immigrant nurses and replace them as they burn out.
You're right to an extent, but there legitimately is a shortage of physicians. The supply can't expand to meet demand regardless of working conditions and pay because Congress has capped funding for residency program slots.
(light edits made to capture nuance vs absolutes, previous comment version started with "there is no healthcare labor shortage", which is not accurate)