That hasn’t always been the case. America was in the realm of other countries in per-capita health spending through about 1980. Then it diverged.
It’s the same story with health spending as a fraction of gross domestic product. Likewise, life expectancy. In 1980, the U.S. was right in the middle of the pack of peer nations in life expectancy at birth. But by the mid-2000s, we were at the bottom of the pack.