@ WeatherMap and Winston
Having read ( not analysed ) WM post, I also got the impression he was saying there were lots of these high-earners, highly-trained professionals working as BA CC which struck me as a little odd.
There is a site calle
Army Rumour Service > > British Army Rumour Service Home which is military and has connections to to Pprune via the Aircrew section. Therein are significant posts about "Walts" ( from Walter Mitty ) which basically means a cook says he is in the SAS to boost his status.
That's the impression.