I like your point. My husband delivers packages to your businesses and your homes. He runs until his shoes are worn through. Tip? He's happy when he gets a soda or an ice cream for a tip. Where's the Fed Ex guy's tip? One summer day a Fed Ex guy (not my husband) dropped off a package and looked amazed that I gave him a bottle of water.
I tried to tip a FedEx girl once. She informed me that they were not allowed to accept tips.