Don't think that Expats. leaving an airline is such a mystery, I've spent a large part of my working life as an expat in both the Middle and Far East.
When FOs leave it is either:
a). They have got what they came for, endorsements and hours, or
b). They didn't get the upgrade as quiclky as they had hoped and feel they are missing out, or,
c). Wife and/or himself don't actually like the expat life and would rather be at home, or
d). They got a better offer.
When Capts. leave it is usually,
a). Wife and/or himself don't actually like the expat life and would rather be at home.
b). The move to the bigger fleet didn't happen as planned and they feel they are missing out, or
c). No career structure is evident, the move to training/management didn't happen, or,
d). They got a better offer.
e). An inability to accept that staying the course of, say, twenty five years as an expat will see your kids through excellent education, buy you a nice house in the UK and give you the opportunity for a happy retirement.
The Gypsy/Millers Court You didn't stay the course so you need not respond.