Looks like they are trying to have more "physical" scans to have more accountability for mis-loads and more info for the customers, kinda like we do at FDX.. We scan every package as it comes in and every driver on the sort scans every package in the trucks.
I can't imagine doing this at UPS when I was a preloader I loaded 3-4 trucks and roughly 300-500 pieces(150 scanned pieces/one truck on a moving belts at FDX is a challenge), it was non-stop at UPS no way there would have been time to scan everything, unless they put overhead 3D scanners (OR RFID) over each truck rear door and it catches it as you enter, manually scanning seems inefficient at the levels UPS works at.