The fact that the UAE, and most other uncivilized countries, have uncivilized labor laws, is, what it is. Most of the world is like that. All the expats that choose to work there know the score before they sign up. They can also quit. They are all volunteers.
As far as making expat pilot tax law different? Really? Just because they work for a competitor? Lets say you work for DAL. Do you think American Airlines pilots should be treated different than you?
There is a lot I don't like about the sandbox, and their airlines, and I have never applied to one. I also don't like their government subsidies, and I think they mostly exist as an economic development tool for the middle east. And maybe as a hobby for some Sheik.
Last time oil went down to 70 dollars or so, Dubai couldn't pay their bills and had to be bailed out by Abu Dhabi. Oil has been below 50 bucks for several months. Another year of this and we might see a lot of late model 777's and 380's being auctioned off.