Why are American universities and med schools so expensive when other countries are doing it right?

Cite the other countries that you see are doing it right? Do you understand their admission criteria? Their education pathways? Their selectivity? % of students able to access a degree?
I see med school as a whole different animal. MD earnings are not the same in the USA as they are in other countries that might look at med school as almost a vocation, like UHC countries.