Earlier quoted context omitted.
If the pill retailed for $0.04 in the US could the R&D be recouped? Americans should feel good about high drug prices: that's your aid to the Third World right there. Not the most efficient technique but still better than not doing it at all.
While in general I agree with you that is not the case here. The drug's patent expired decades ago. The issue is that there is only 1 US manufacturer giving them pricing power. It's unclear to me why another drug manufacturer doesn't come in and undercut the price. This is what happens in most other industries. My gut suspects the arduous FDA approval process, but I have no real evidence for this hypothesis.
Also, it's difficult to acquire approval needed from the FDA to demonstrate the new drug is safe and equivalent to the already approved because the original producer won't cooperate and provide relevant samples to their competition so they can demonstrate equivalence.