How do courts uphold this? You go to a restaurant, they say you can buy the tasting menu for $100, but they have a temp chef working that day which will cost you $50 extra, which you find out as you're paying.
I mean you might even be unconscious when this is happening?
EDIT
Actually someone brought up an important point. If you go to a restaurant, you are kinda expected to know that there's taxes and tipping to pay. Do the US courts think the same of healthcare? "You were in a hospital, you should have known that the bill is always higher than the sticker price?"
It would surprise me as a European.