Never heard of separate contracts but years ago the part timers earned the same wages as a driver did. There were just two gals who were part-time who retired at my old center not long ago. One was a clerk and one was a porter. They both made $34 an hour and had 7 weeks vacation because they fell under the old contracts. UPS was glad to see them finally go. Those glory days are over and it will only get worse by what I read on here with people not caring about having a strong Union.