Not sure where you see the "higher salaries making that up in just a few year", since ex-students are saddled with debt for decades after graduation, and tons of young people can't find decent jobs. Low unemployment doesn't mean "enough paying jobs".
>As to “quality of life”—that’s subjective.
Well, not really.
>If I wanted to live in a 900 square foot house without air conditioning, like the average Finn, I’d move back to Bangladesh.
Well, if you mainly have Bangladesh experience to compare to, it's no wonder why America looks like such a wonderland to you.
For the average American it would be a huge upgrade to live "like the average Finn", even if they don't have the larger (shoddily built, average American houses are the worst I've seen in the west, and I'm not even getting into trailer parks and ready-mades) house.
As to “quality of life”—that’s subjective. If I wanted to live in a 900 square foot house without air conditioning, like the average Finn, I’d move back to Bangladesh.