I think they also flood the market, so good drivers are pushed out or flooded by bad drivers. I used a door service in Denver that was selected by the restaurant, and they had uniformed drivers and good service. Not booger eating skanks with beat up cars. They had clean cars and clean drivers.
In my area, all of the drivers are like that. I haven’t come across one yet that was “skanky.” We’ve become sort of a little fraternity (although I’m a girl! :-D), and we take a lot of pride in what we do. I keep hoping the good drivers will push out the BAD drivers.