Bdcause after do many years of regular flying its a change. Idk about you but some people do NOT like change.
What i mean about that is in my work field people move around a lot. Usually due to bad management but some stay a very long time. Why? Because they like doing the same thing they have grown accustomed to it. You got people working there for 7+ years doing a good job but they get paid less then the new hires even when we get raises once a year