I just love these debates.....ok here goes.
The FOM is not part of your contract with respect to pay.
Some of our FTDL's may be illegal in Europe (I don't know and I haven't bothered to find out, nor do I care to) but I have no doubt they are legal in the UAE as the GCAA is the regulatory authority. If they weren't legal, the UAE would be on the ICAO black list just released.
The contract is (and always has been) a very long, long way from being explicit.
No defence, no personal attacks, just the facts.
By the way, do you own a red tie?