The thing is, medical bills in the US are blown out of all proportion, and have nothing to do with actual costs.
This has been well documented and studied time and again.
It's not like Sweden or Denmark have much worse hospitals or doctors -- on the contrary, even a crappy US hospitalization will cost you several times more than what it would cost you there.
Heck, I was taken into a first class private hospital in an (advanced) Asian country, stayed there for the night, was taken care of by 4 nurses, had several exams/tests made, was consulted by 2 doctors, oh, and they even got me there by ambulance after a friend called (I had fainted atm).
I expected the worst, but the next day I was asked to pay something amounting to $50 -- without even having an insurance coverage (as I was just visiting).