The US doesn't have one healthcare system, it has 50+ (or 51, ...59, is healthcare in Puerto Rico part of the US healthcare system?, how about American Samoa?). Contrary to many peoples opinions the "healthcare system" is not operated or overseen primarily at a federal level. The federal government is one of the largest buyers of healthcare as an insurance provider, that is true.
Comparisons to other countries that are much much smaller than the US are sort of silly to me. Europe does not have one healthcare system. Subsidized education and price controls in foreign systems also make comparisons excruciating. I think it is usually a canard. OECD data is, in a word, "garbage", as it relates to healthcare. Just one example: In the US, eyewear for seeing purposes is healthcare. In almost no other countries do you need a prescription for eyeglasses. Prescription eyewear in the US is a 20-30 billion dollar market, depending on how you want to count it.
I think the mechanisms for paying for healthcare in the US are really inefficient and involve too many intermediaries. This is a result of a lot of accidents of history. America is a very physically large country with a lot of people all over it, we expect very high standards of care, we consume a tremendous amount of pharmaceuticals, we have wildy abundant and relatively inexpensive food that seems to be correlated to our being much more overweight than a lot of other peoples, we engage in a lot of dangerous activities at a rate that far exceeds what a lot of other peoples do that seems to correlated with our culture, on and on.
Instead of hand wringing about differences between ourselves and other cultures we would be better served looking at boring things like medicares 3 million pages of medical claim guidelines, clearing house operations and conflicts of interest, better incentives for state level responsibility, antitrust litigation, lots of practical things that don't make click bait headlines.