He wasn't driving for Walmart of making that kind of money then, so I hope he was able to move into a different career that didn't do further damage.
It's not a job I'd want to do. Ergonomics aside, I find driving to be very unpleasant in large doses. Having to put up with traffic, shitty drivers, weather, and everything else 8-12 hours per day is not my idea of a great time.