"Compressed salary structure" -- thanks Redherring, that's what I was trying to express but didn't find the term for!
But I'm afraid some of the other stuff you mention is true for some parts of the Nordics but not for all of the region... The bit about very high mortgages, car loans, and exotic holidays. I know in Sweden it used to be unusual to even pay down your mortgage, people just paid interest and waited for the value of the property to go up. Nowadays I think you have to pay your mortgage until you get to 50% of the value, and then you can start just paying interest. Crazy! And not possible in the whole region, at all (neither by the law or by the banks).
The same goes for the salaries across this region: I don't actually know any carpenters but find it hard to believe a carpenter here could earn 100+ k€ without either a) working an illegal amount of overtime or b) having their own business. The median yearly salary for a carpenter here is 32,400 €, and only 10% of carpenters earn 42,500 € or above. This is about 36,000 and 47,000 in USD.
twinstudy inspired me to look into the stats for incomes in general here: In 2021 you made it into the highest 10% of salaried people here if you earned just over 75 k in USD. And you reach 50%+ marginal tax rates already at 64 k in USD, so net incomes are a lot lower.
Since we're fighting misinformation here, health care is not free here. It's not prohibitively and unendingly expensive, either, but even the basic level you get from the public service providers does have a price tag for the patient, and many people have private or employer insurance to get a better level of service. And the state pension for all is very, very low, not much more than what our family of four pays for groceries. The main part of the old age provision comes from money you and your employer pay into a pension insurance scheme throughout your career, so it works a bit like a tax on your salary and your employer's bottom line and you can't influence how those funds are invested. Still, it's very much dependent on your salary across your career, not at all something that's paid to everyone. Since we're living longer and there are fewer paying into the system, the age when you can get either of these pensions keeps creeping up and is now close to 70 for people in their 30s. But yeah, most of education is free (for now).