In my opinion, one aspect - part of the whole "best paid truck driver in the country "- is overrated.
In rural Texas for instance, $80,000 a year is worth about $30,000 a year in other areas like CA, NY for instance.
I can hardly live off $24/hr working 22.3 inside in the area I reside. In other areas that kind of money you can live like a king.
Therefore, being a UPS driver or any FT employee is hardly "worth" the harrassment, mindgames, and physical labor depending on where you live. That is a large part of whether or not you "like" your job or not.