tooner, with all respect I'm suprised and disappointed that you feel between a rock and a hard place. In such a position we do the best we can and let others do the same. It's the rule of UPS. We have folks who are not as physically strong as others, we have folks who don't care and we have folks who are such management suckbutts that they don't have to work hard.
It's up to the powers to decide what to do with each and every employee. It's not our problem if they slow down the belt, want to stay for extra money or to get away from the wife.
I'm a 53 year old sorter who's been with UPS for 16 years. I've given them blood, sweat and tears so they dammmmed well give me some slack as I get older and, yep, slower. Would they like to replace me with a younger, faster employee making less than half the money? Probably, but the age and physical condition card is tucked away and will be pulled out if and when necessary. At this time my numbers fall right in the middle between the busters and the slackers.
And as for YOU, kid - You could be more productive yourself if you stopped watching and whining about what others are doing. Old coots like myself often see young whippersnappers like you and just smile. We are above and beyond needing your approvel, trust me on this one. Meanwhile, we take our generous paychecks, pick our vacations first and bump your little buns off the personal day list.