The reason it screws UPS employees, is that:
Imagine you have enough packages for 3 drivers to work a full day, at 34 an hour(hopefully). They can jam those 3 trucks worth of packages on two trucks, and pay two full time drivers, and one
bag who came in off the street at 11 an hour. It saves UPS money, and it creates less driving positions, keeping part timers part time making less. Glad Teamsters are so against it. Completely understand why they need them during peak. We actually have to rent UHauls the last few weeks before peak just to keep up.