It would be a given that Bahrain could offer him more than we could/would. however I would think he would be making a decision based on more than money and wouldn't even have contemplated a move if it was mainly about money. My bet is is because of the political siuation over there more than anything else.
Also working in that heat would not be much fun. Of course it is not easy to adjust living in a place that is culturally and religiously poles apart from your normal lifestyle.
but money talks lads