He NEEDS to remedy the pay discrepancy between carriers hired before 2013, and those hired after January of 2013. On average the older carriers make 10 THOUSAND more per year year for doing the same job. Over the course of their pay raises, it becomes a $150 thousand dollar difference over their careers.
Improvements? More efficiency? Cut mail delivery down to 3 days a week? Etc, etc, etc
No! That’s the whole point, replacing older workers as they retire with younger lower cost workers.
Good luck with that.