Norway has been considered to be super-expensive among tourists and others looking in from abroad. However, Norwegians going to the US really have to mind their spending nowadays, especially when eating out. Forcing employees to rely on tips to get above slave wage is generally not a thing in Europe, so the price we see on the menu is what we expect to pay.
If you go to a gas station near an airport in Western Norway, you can get a massive 300g burger (3/4 lb) with added cheese and bacon for about 200 kroner, which is $19. If you want something that normal people can finish, a regular 150g cheeseburger is about $12. A McDonald’s double cheeseburger is 43 kroner, or $4.12. If you order a burger at a restaurant or a pub, you’ll probably be spending about $25 for a bacon cheeseburger with included fries. You’re not expected to tip in Norway.
Considering that the prices Americans here refer to don’t include taxes and tips, I’m actually pretty sure it would be more expensive to eat out in the US than in Norway, and average pay for a waiter/waitress here is about $41 000 per year.
I've lived in London for seven years, never felt there was pressure or expectations of tips, though there were options to tip on the card terminal occasionally. But yes, wages in London are shit (unless you're a banker), so if I could afford to leave 50p in the pub jar, I would.