“Flight Operations Quality Assurance”.
Basically, if the safety department sees some red flags pop up for a flight ( unstable approach, flap over speed etc) and they want to know more, they call the gatekeeper, the gatekeeper is a pilot who isn’t a trainer or management, they go through a procedure to identify the crew and give them a bell to ask the questions the safety guys want answered.
I realise that with Fatigue the company needs to know who is Fatigued etc but if the pilot knew that they would be dealing with the gatekeeper rather than their manager they might make a better call as to pulling the pin.
Make it so that if you call fatigued you know you are only going to deal with an elected gatekeeper and they will liaise as necessary with management types. It would prevent managers implying that the pilot is at fault even when it is clearly the rostering/ recruitment that is at fault. Is that what you were suggesting?