Harry picked a nine year captain and said that someone on that wage with basic math skills would probably make the decision to stay if the decision was purely monetary. An excellent choice that would be, as there is still an additional $6400 monthly to be had just to hang around, rise to the top of the pay scale, and perhaps take on a training role (15,000+8500 dirhams). He also judiciously forgot the 12,000 dirhams which are dropped into the provident fund every month for a senior man - very real money waiting for you the day you depart. So there's an extra $9600 to be had for a new total of more than $26,000 USD monthly.
Where ever else this argument takes you, have no illusions that you will be better paid somewhere else. You'd need to be an unhinged ranter and a moron to try that on - where is Mensa boy when you need him?