I think all the info is out there. What do you want to know?
The GCAA is paying the OT, at 2000dhs per shift. The cancer that is OT has arrived. The mass exodus you are talking about is actually OUT of AUH. Why do you think they are resorting to OT? The guys here are doing the OT in order to bring their money up to where it should be anyway. How long do people think that will continue? The ridiculous rosters, the lack of days off, and now the OT will lead to fatigue, sickness and sap morale (and there is precious little of that).
It's sad that people are working on their few days off for money they should be getting anyway. Take a look around the gulf and see that most places are realising what they have to pay. AUH lags so far now, it isn't funny. The problems mount, and Nero fiddles.
Serco will not get the bums rush- not this contract. They will get a renewal. The GCAA realise they cannot staff the contract, so Serco will get one last go (and mess it up totally, as usual). Trouble is, RJs battle with Serco just hurts the staff, and not just the expats.
Lots of other places hiring with much better T&Cs. A simple fact.