What, do you think, that theres a fixed number of doctors, nurses, facilities etc., per country?
China and India (which have about 5x and 4x the population of the US, respectively)
China has a per capita GDP of $5,413, India's $3,693 and the US? $48,386. See, thats why.
Germany has a rather more comparable GDP per capita at $43,741.
Comparing US healthcare to China or Indias, is comparing apple and oranges.. Comparing US healthcare with western europe healthcare makes sense.