Can you cite some evidence of this? I don't know of any any profession that earns $0 an hour. Even restaurant folk make $2.22 or whatever, and they must make at least minimum wage with tips.

Now a skycap may tell you're they're not making any money, but I would doubt their veracity. I knew a skycap almost 20 years ago. He was making $60,000 a year at the time.

If I have to feel intimidated to hand money over, then it's not a real service is it? So if you pay $10 for two bags, and it takes 90 seconds for the skycap to tag and move your bags. That's $400 an hour, plus his wages that he does get. Seems pretty ridiculous.