I really would not want this. I already compare myself to my peers and feel the pressure enough. I don't want to have the salary figures as an extra metric to obsess about. I think it would lead to a lot of resentment and be generally unproductive
People, to the great benefit of companies, tend to actually negotiate up front and then not want to think about money as long as they consider it “enough” for their lifestyle, at least not wanting to revisit it on a weekly or monthly basis.
It allows people to fool themselves that they do what they do for something other than money, and or they’re afraid of any conflict in the workplace (and thereby instability).