Earlier quoted context omitted.
Norway has a high wealth tax (it’s gonna be 1.1% of total wealth per year in normal cases), high capital gains tax, and an exit tax treating moving abroad as a capital gains event. This means, if you start a not-yet-publicly-listed company, get investment at a high valuation (on paper), you must pay wealth tax as if you had that money liquid in your own name. But you don’t have it liquid, it’s yet just a valuation of…
It's also an attractive destination for people wanting to live in a society that's not completely broken by inequality and are willing to pay their membership dues for living in such a society. Not everyone's top priority is building a big ol' dragon pile of gold.
Overstaying a visa is an offence and if you've gone through the efforts of getting one in the first place, you should read the regulations. Most of us do and act accordingly as I know from own situation this summer.