Some are going to Jet2 , Ryanair , Norvegian , British Airways , Air France other ( from the USA ) are going back to American Airlines , United Airlines or even some corporate jet companies.
The main thing is that most probably you are just thinking about the net salary that you get here BUT there are other problems that you have to cope with when in the Middle East...
I will not explain as this is discussed in detail in many places on this forum.
Mainly people just want to go back closer to their family and friends , enjoy more cultural events and get away from the extreme heat we have for 6 to 8 months a year.