One way to look at it is: how would you like it if it was discovered that a drug lord was using the same bank as you to launder money, and therefore your bank account balances and recent transfers were released to the public, even though you had nothing to do with the drug lord other than storing your money at the same bank?
Wow, that's horrible. I'm assuming it's some kind of "societal good" social engineering Norway is doing there. But why anybody would think that's a good thing is beyond me.
Perhaps I'm concerned about the quality of my country's management. If for that or any other reason, I decide to put some money into foreign currency and place it with another country's banking system, while continuing to comply with my own country's tax laws, what right do you have to steal the information and publish it on the internet?