"Poorer" countries than the US like Portugal, France, Japan, UK have far better health outcomes including lower infant mortality, lower chronic diseases, better life expectancy than the US.
As far as infant mortality and life expectancy, the picture is a lot more complicated than you portray.
The US is including in their life expectancy data cases of stillbirths or nonviable fetuses at birth, which are not recorded in EU numbers, for example.
" measurement problems arise in international comparisons because the data are not consistently gathered or reported. Although the World Health Organization (WHO) has a formal definition of what should be included in the infant mortality statistics, anecdotal evidence suggests that countries do not use consistent practices in measuring these data (Haub and Yanagishita, 1991; Hartford, 1992). "
The US is the only "developed" country where 10 are uninsured: https://en.wikipedia.org/wiki/List_of_countries_by_health_in...
Another N% are under insured, or hampered by high deductibles, copays, limits etc.
Whats the point of having a "high median net worth" if the basic needs of the people aren't met?