Another key factor is a very high level of trust in the country. As citizens put it: “I have to pay a lot of taxes, but I don’t really care, because I know that [the state] gives you so many things at the same time.”

I don't know how Norway scores so low in corruption, and how such a high level of trust among strangers, people and the government has evolved though.

I worked in Norway for a couple of months (They payed me really well as a junior). One of my first impressions was their emphasis on being honest. The first thing the manager told me is that he once hired a person who admitted being "weak" because he appreciated his honesty.