Not voting to strike. UPS has allowed me to own my own home and support my family all without a lick of higher education. Everyone at some point had to work insane amount of overtime and deal with the elements. Once you put in the years, you will see how this just is a cakewalk.
You think this

is tough? Look at people digging ditches, doing landscaping day in day out. Work safe, drink lots of water, use the methods and take extra cooling breaks during the hot summers. Stop playing into the games of management if they tell try to reprimand you for looking out for your own safety.
As for the part-timers, I do think their wages need to be looked at. Most jobs flipping burgers pay 15 bucks an hour starting in a lot of areas and some even pay more.