The interesting part is management recently stated at MCO that this logic is fine with them. Turnover saves JetBlue money by reducing seniority. Make no mistake management does not value the pilots as career employees. Management views the employees as liabilities and not assets. One of the Union reps relayed a story of the new CEO showing the order of importance of employees, customers and investors. Employees were last. When questioned he stated that's the way it is even in the face of Fortune 500 companies placing their employees first and then expecting them to take care of the customers.
Legacy carriers are carriers by providing commensurate pay and benefits. Jetblue is just a job with a pay and benefits package rivaling many regional carriers. A large airplane a major does not make.
Can things improve? Absolutely.
Is management incentivized to do so, no.
There is little attrition and thousands of low time pilots applying. Do the math, JetBlue has.