And who doesn't have at least one person like that in their life? Although it definitely wouldn't be limited to just jealous or spiteful family. Public salary information for all people would cause routine problems between friends and family across countless situations and issues over a lifetime. It's a recipe for social disaster.
Tax information, which is both salary and wealth information, is public in Norway since some years now, in electronic form. Media did a bunch of useless posts about celebrities for a while. But apart from that I cannot think of any bad outcomes, certainly not a lot of social disasters.
Norway - Scandinavia in general - has a distinct culture that isn't shared by any other region on earth.
Some things that are perfectly normal in the US or South Korea or Colombia or China or Japan or Zambia or Saudi Arabia or India are without a doubt not considered acceptable or comfortable in Norway. That's how cultures work. What you're describing is an extension of Scandinavia's culture.
The hours worked in Japan or South Korea are culturally acceptable. They would not be in eg France. One could spend an immense amount of time listing the thousands of famous cultural variances between major nations, in regards to things being acceptable in one place but not in another.
