They have different cost structures and much higher taxes, and their healthcare couldn't exist without multi billion research efforts US healthcare consumer pays for. How much pharmaceutical innovation is there outside the US?
[Roche](https://en.wikipedia.org/wiki/Hoffmann-La_Roche) [Merck](https://en.wikipedia.org/wiki/Merck_Group) [Bayer](https://en.wikipedia.org/wiki/Bayer) [Sanofi](https://en.wikipedia.org/wiki/Sanofi)
Even supposing all pharmaceutical innovation comes from the U.S. still does not show that without the U.S. there would be none. Clearly there is a market for drugs and the U.S. is not the only country with research capabilities.
Taxes are not that much higher elsewhere. People are not being taxed to death elsewhere.
It seems the barbarians are certainly at the gates. Oh well, we had a good ride.