Interesting, but here's something to consider as well. I take a daily set of pills to ward off the effects of Ulcerative Colitis. Up until last year, there was one source for it and no generic version. I have an old work friend living in Windsor, England who, unfortunately, has the same disease and takes the very same stuff from the same maker, even to the dose.
My stuff in America costs $650 per month, and my Massachusetts version of Blue Cross insurance picks up $550 of that (and thank you very much). John's monthly dosage in the UK (the "list" price is shown on his receipt from his druggist) for the same stuff from the same maker, is £128 pounds and his national insurance picks up all of it.
That's about a $500 difference in list price for the exact same drug between America and the UK.