You mean the fact that other countries, by law, are subsidizing their health care on the backs of America’s industry, which is paid for by American customers?
The US should deduct the differential per dose times the number of doses sold in each country from its foreign aid budget for that country, including sending invoices for those countries who do not get enough US foreign aid to cover the difference.
That is a great idea. We pay too much for new drugs, precisely because we are not just paying our share of the cost of R&D, but also the R&D share of the cost of the drug in every foreign country. If the R&D costs were spread out among the entire quantity of drug sold, our prices would go down. While the foreign prices would increase, they would not increase to the price we currently pay to subsidize them.