Where are these "boatloads" of FT jobs coming from?
Some hubs may be able to create FT jobs combining back to back sorts, but the majority of UPS operations are centers. These usually only run 2 shifts. The morning preload and evening local, or reload. Even most of the hubs have hours between sorts.
The only way to create FT jobs there is to split shift. Work 4 hours in the morning and then 4 hours in the evening. Or 4 hours at a hub on one sort, take 4 hours off, and then come in for another 4 hours.
I agree, there can be some FT jobs created, but boatloads? Yea, right. Unless you want to split shift.