Aren't governments meant to be money holes? You put money in, you get governing out. They're not meant to be turning a profit.
Another issue is, you’re de facto giving the rest of the world a free ride on US taxpayer largesse. Even better free ride than what they’re getting now: paying a dime on the dollar for newest genetic drugs without spending any money on their development. I’d go along with that in the poor countries like India, but I see no reason whatsoever why I should be paying 5-6x as much as some dude in Western Europe, all while he tries to lecture me about their “free” healthcare. I’d much rather I paid less and they paid the same as me.