Wow, this is a mouthful.
So, here's my take:
You mentioned something very important. HR really does screen application files by screening for specific words. I disagree on one thing; that is a very efficient way of cutting down candidates. But it is the most ineffective way of doing so.
A scientific approach may be achievable now that profiles be authentic.
As for the transparency factors you mentioned for employees, I believe a project called Grain is doing that. Perhaps SpringRole and Grain could partner up and provide a more complete set of transparency.