I don't hate drivers. I'm not even sure if they're overpaid. UPS doesn't pay them that much out of the kindness of its heart. And if drivers have to work as much overtime as they say, then UPS appears to have a shortage of drivers - unless it just likes to squeeze as much work out of them as it can.
However, it's no secret that drivers get 90% of the union's support. Full-timers get 9%, and part-timers are lucky to get 1%. My anger is directed at the Teamsters more than the drivers.
At the same time, I feel some anger and frustration towards all UPS employees. It's a caste system, and most employees are absolutely clueless politically. A big percentage are union whores as well. It's pretty much a lost cause; solidarity, my ass.