Driving a taxi is one of the top ten stressful careers in the world. And we didn't just come up with that by interviewing a handful of cabbies. Long hours, vulnerability to assaults, back problems, traffic, fare evasion, passenger threats, and few or small tips can take a toll on a person. Some taxi drivers work up to 80 hours a week to make ends meet. When you think about it that way, the $20k you’re making annually isn't sounding so hot any more. And it already sounded pretty darn cold.