I don't concern myself with "Good gravy! If everyone paid them that much, they'd make a mint."
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To each their own. I pay attention to my dollars so I can afford multiple trips (and as you know there are a few people to tip along the way..the guy who takes it out of my trunk and brings it to the shuttle, shuttle driver both ways, and the baggage guy adds up each trip). We're retired, and love to travel, and do so often albeit on a budget, so for us, it adds up. I figure if they can move 60 pieces of luggage an hour, the $60 an hour is a good pay. I'd be happy with it..and it sounds like they do a lot better than that. If they want to lose my luggage because I don't tip enough..well that would make me not want to tip or use them at all...but so far our luggage has always made it and in good shape. If the cost was more than $1 a bag, we'd just bring it inside, and wait what is usually a 10-15 wait. We have nothing better to do, once we are there. So I guess if they only get our dollar per bag (which is a few bags), and others give them $5 a bag and more, they do alright for themselves, and I won't feel bad.