In tech jobs the same job posting could just have a range that goes from basic engineer all the way to the highest possible principal engineer pay, since the posting is for the domain area not the specific level of experience. Govt jobs are often like this too, giving a range of levels and a big range of possible salaries, especially when they include the possible geographic variation in pay.
You still wouldn't know whether others with 8 years experience and a MS or whatever, make more or less than you do.
Interestingly, this hasn't happened in places where pay is required! Companies split up their postings by title/level to make sure candidates know their time won't be wasted at their level.
You still wouldn't know whether others with 8 years experience and a MS or whatever, make more or less than you do.