Great example of this is Amazon delivery drivers. I assume other cities in the west have those Amazon vans going around now delivering stuff instead of relying on local mail services. In my experience these guys are the absolute best delivery people in terms of their customer service. If they try to deliver something when I'm at work and can't get into my building they will almost always phone me and if I ask if they can come back in a few hours when I'm home they almost always do. I'm just assuming they get paid less than UPS, FedEx, ect delivery people, yet the service they offer me is vastly superior. I always try to throw them some dollars if I can.