Kapter,
The answer is, why are former Ryan Air pilots leaving EK to return to Ryan Air? Why are T7 captains leaving to go to Jet2? What would entice pilots to go to Turkish for less money? The evidence is there. And you're worried about not getting summer leave? Last guy I flew with had 45 days owed to him. He's just trying to get leave, period. Ah, but you do have the opportunity for nice warm crew meals.