I have also wondered a similar thing.
In addition to this, if there are any chief pilots out there that do a bit of hiring and firing, do you view loyalty to an employer as an admirable attribute, or do you not really care if your pilots are plane hoppers, doing 6 months at each place then hopping off to an outfit with bigger better planes?
From a farming background, we always liked to employ blokes that had a solid work history in the one place rather than the breeze in breeze out types. Surely someone that will hang about is going to save you money in the long run because you wont have to advertise, interview, hire and train new staff at great expense all the time?