Not so much salaries, as declared gross incomes and wealth.
Salaries are dealt with via bi-yearly negotiations between unions and business representatives.
Note btw that there is no minimum wage legislation in Norway. Instead the agreement formed during negotiations apply not just to union members but to the business sector as a whole.
It's not true that tariffs apply to everyone. The only law that apply to everyone is is Arbeidsmiljøloven. Some tariffs are generalised and is a de-facto minimum wage in that sector.
Salaries are dealt with via bi-yearly negotiations between unions and business representatives.
Note btw that there is no minimum wage legislation in Norway. Instead the agreement formed during negotiations apply not just to union members but to the business sector as a whole.