Corporations (at least mid-size and large corporations) already have a pretty good idea of what their competition is offering. There are companies that survey

Corporations (at least mid-size and large corporations) already have a pretty good idea of what their competition is offering. There are companies that survey employees for salary information, collect all that knowledge, and then sell it to corporations. Medium and large businesses already have a very good understanding of the job market and what a competitive salary range is.