you're basically at the mercy of the guy with the car keys
Yup. Might as well call a friend at that point.
Sorry to hear about you're driver taking you for a ride - that's what you paid for, right?
Those corporate fat-cat taxi drivers, always trying to screw the little guy! Seriously, maybe I'm ok with it as long as the driver is getting the extra money. If the driver gets a small bonus and the rest goes to Uber, well, maybe a little less sympathy.