The reason I haven't responded to you, Re-Raise, is because I took advantage of this site's convenient "ignore" feature after you launched personal attacks. I'm only aware of what you wrote as quoted in the posting above me, and while I don't have to respond, I will as I ponder why you'd think I'd be working: I'm dead-last in seniority (within my center; three centers under one roof), it's mid-winter, volume's down & few vacations are scheduled.
Like every job, this one has additional intangible aspects but you're living in a fantasy world if you believe you entail much more than driving and delivering (and picking-up) packages. You know it's manual-labor. You know you could be driving in all weather. You know you could be delivering to any residence, including ones with long walks, ones with many stairs and ones with ferocious dogs. You know you could spend 15-minutes looking for a single package. You know that doing this will exploit the aches & pains that come with age. But that comes with the job, it doesn't change what the job is. There's a reason many young drivers, in their early 20s and with minimal training, blow the numbers out.
If this were truly a skilled job, then you'd be able to negotiate your wage should you move on from UPS. But you can't! Your experience with UPS may place you near the top of a wish list, or give you a minor premium (a dollar or so), but ultimately you'd be lucky to earn half (and probably closer to one-third) of your current wage. And don't expect much for benefits, if at all...
Yes, many of us work in hostile environments but that's not unique to UPS. Nor do drivers spend much time in the center, anyway. Do you know why many managers treat their subordinates like garbage? Because they know they can. They know that drivers are fearful of losing their jobs (because they'll never earn an equivalent compensation) and they ride this fear to do whatever they darn well please without fear of grievances, etc.