> I've spoken with (drunk to be honest?) recruiters that got a lower overall commission the higher the salary for the recruited person got.

Not to be an asshole, but that wouldn't suprise me. Maybe I got more cynical with age but anytime someone I don't know tries to tell me, implies, makes me feel that he/she is my friend and wants what's best for me, without a clear reason or incentive for it being so, I get real suspicious real fast.