> The amazon model isn't to drive horribly and park badly. They just pay too little and try to insulate themselves from accountability by hiring contractors while overworking their drivers
These are not mutually exclusive. Quite the contrary, I would say they're precisely equivalent.
If you cannot give people an appropriate workload to do a good job, and they'd end up homeless if they quit, then the result is that they will do a bad job.
And the reason it's the most profitable model, is that they've insulated themselves from accountability, and everyone else pays for the negative externalities of crashes and such.
That is 100% their model.