The poorer customers in foreign markets get the drug more cheaply

The problem is that not all of the markets with lower drug prices are poor. Many rich countries are also free riding off the US market.

A sensible policy would be for the US to demand prices no higher than those charged in other developed markets. US prices would likely decline a lot, and prices in those other developed markets would likely have to rise somewhat.

Anyway, I dropped by because I felt your post was fair enough, but a bit overrewarded so I placed a moderate downvote.