"Seniority is everything"
Some people like money. If a senior check airman who can hold a schedule that allows for lots of OT stays as long as they're doing 300%, that makes perfect sense to me. Not everyone wants to retire at 65 as a burden to their (probably digital, work-from-home) FO's. There's something to be said for making 3/4 mil. in a year earlyish in your career.