Lotto tickets are nice, boss, but can I have my bonus?

It seemed like an epic blunder: United Airlines announced that it was replacing a standard bonus with a lottery that would give nothing to most of its roughly 90,000 workers while awarding lavish prizes, like $100,000 in cash and Mercedes-Benz sedans, to a few lucky winners.

United had hoped the sweepstakes approach would "build excitement and a sense of accomplishment." But after workers deluged the company with hostile comments, the airline said last week that it was "pressing the pause button on these changes."

The fiasco pulled back the curtain on the widespread use of gamelike techniques for motivating employees.