Here at Metro, Ride Checks are done by uniformed supervisors, ADA checks are done by chiefs (person right below the person in charge of the base), who try to do it incognito, and dont have uniforms. All in all, our stuff is done by employees. Even that link I sent you some time ago about San Diego doing secret checks are at least employed by MTS, not a contract agency.
At TRIMET they have a whole department full of who knows how many Trainers!
This sort of evaluation should be done by our training department, not low paid workers for some profit making contractor!