Anyone who wants productivity pay has rocks in their head. It was Aed 460 for a Captain in the 90s when a 1st yr Capts salary was circa Aed 20000, and you got it after 84 hrs, with credit given for leave, SIMs, RSV etc etc.
Its Aed 600 now after 92hrs, with no credit for anything other than block time (well ok, SIM if your a trainer or Support) and the Capt basic is circa Aed 35000. I am with Drop on this one. I don't work extra for less money.
Do not say you will waive the payment for a trip you want, as suggested above. That will only help the slide down the slippery slope. Its only a job. If you need to dial two to roster adjust, do it for a nice trip, as it helps your roster, and is a bonus for the fella called out. A true win win.
The Don