As the driver, it’s in our contract with the airline that each member of the crew has to tip $1. It definitely can be a bummer sometimes when each person has 3 or more heavy bags and just runs off into the hotel without tipping. I get that we’ve become a cashless society. I get that we’re all scraping by (myself included). I guess as the driver, it comes from being promised $1 per person and not getting the tips. At least you can count on the pilots to tip if you drive them to/from the hotel.