That’s the premise of the new Sci-Fi flick, In Time, starring Justin Timberlake and Amanda Seyfried:
The trailer doesn’t sell me on this, but it is interesting to think about alternate forms of currency. You could go deeper, and get into the sort of control that the state exerts through its control of the currency. Certainly dying if you run out is a bizarre and totalitarian punishment for going broke. But it’s an interesting premise, and I suppose the movie could be either really compelling or really stupid. It’s hard to say.