The 10 most overpaid jobs in the U.S.

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7) Airport skycaps

Many of the uniformed baggage handlers who check in luggage at curbside pull in more than $100,000 a year -- most of it in cash.

On top of their $30,000 to $40,000 salaries, peak earners take in $300 or more a day in tips. Sound implausible? That amounts to a $2 tip from 18 travelers an hour on average. Many tip more than that.

While most skycaps are cordial, a good many treat customers with blank indifference, knowing harried travelers don't want to brave counter check-ins, especially in the post 9/11 age. Their work is more mindless than that of a McDonald's counter clerk, who at least has to bag the order correctly.