Great example. You do know that we can call our version of the IRS(Skatteverket) and simply ask for any persons taxes and find out how much they make? Including capital gains. All you need is their social security number (personnummer) which if you don't have you can also get from a different branch of Skatteverket! You simply need to narrow it down to a distinct person.

Try it, it's fun! You get more leverage that way.

Sweden releases the summary numbers, not the entire return, and controls access to the list.