Comment by rossdavidh

So, I'm sure the format and medium is different, but companies HR depts have been sharing notes and checking on what the market compensation is (for any given job and experience level) since forever. IANAL, but this is not a new thing.

I've even known co-workers who said "I deserve more $$, I'm underpaid for my experience and job" and supervisor repeats this to HR, then HR checks on it, and a few days later says "true, here's a raise". This was in the 90's, btw. Not a new thing.