nod I think these are two branches of the tree and this problem is more in line with role disclosure (I'm not saying this well - for example, the need on job postings to list the actual salary range up front, like I know some non-US countries and I think recently Colorado? implemented into law).
The branch of this problem tree I speak of intersects more like "OK the band for level 3 is 50k-60k USD. Mark makes 60k and I make 50k but I feel my work is better than his and I've been here longer." This article is mostly about individual sharing, I think that quoted part is a nod in context to the other branch of the problem root which is just as important in it's own way. Not the best at making up examples, sorry.