I have needed to provide information for a visa application including family history on dead half-relatives from a branch of the family tree I have very little contact with. It was a breeze. Names at birth, later marriages, dates of death and everything that I had no idea was given without delay (as stipulated by law).
One should always do as good due diligence as possible before doing a major change in life such as moving to another country. No matter which country it is.
When I hear "monitor your personal finances" I think on a month to month basis or more frequently.
In Sweden, as written above it is yearly and with several months delay.
Also what you you write just doesn't "feel" realistic at all. Source: I live next to Sweden and have Swedish colleagues.
Only way to get salary info is to count backwards from the tax records, which are made public after the coming May.