My understanding is income tax and income is public in many of these countries.
This is why it's not as bad as you think.
"As part of Finland’s celebrated transparency, any member of the public can call up the local tax office to enquire about a total stranger’s annual income and tax contributions." - https://yle.fi/uutiset/osasto/news/in_finland_all_it_takes_i...
Also tax and income data for everyone earning over 100 000€ a year will be posted publicly online (with an option to opt-out).