Knowing or not knowing the specific number doesn't change anything with regard to relatives/friends bothering you for money. People who know you see how you live, where you live, etc and know generally where things stand.
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.
You can choose to distance yourself from these people you know?
Blood is no reason to keep these kinds of emotional vampires in your life.
If you have jealous and spiteful family you might feel differently. Unless you like hearing sob stories or being blamed for other people's problems.