I was under the impression that the FOs in question are only going to be flying the civilian aircraft for AirTanker the airline under their AOC.
As such, I guess they won't need to cope with the extra demands of flying an aircraft that has ROYAL AIR FORCE painted down the side. Obviously that can only be done by people who have endured the rigours of 120 hrs flying on 45sqn, not to mention the hugely important skills gained by completing IOT ( the efficacy of which is clearly demonstrated by the adminers and ops support dudes who set the world on fire daily....although only accidentally!)
Anyway, It doesn't really mater what their wider military worth is: They won't work for the military.
Lucky them.