[legerdemain]

I haven't seen anything exactly like your suggestion, but every company I've worked for (from 400 to 40,000 people) had an internal mentoring program that would set up early-career people with more senior people. I've never heard anyone say they tried it and found it useful. Every company I've worked for also practiced a culture of discreet secrecy around every topic a mentee could conceivably want to know about: compensation, performance evaluations, where you, your boss, and your team stand within the company, etc.

It's sad, but gossip is ever-present at companies because it is the best and most informative kind of mentorship. Far from accurate or reliable, but still the best among a field of bad candidates.