I sort of get the argument that cities have an interest in equitable transportation for all of its citizens. But interestingly, my guess is that an Uber-style service probably works even better for the "bad" parts of town. First, it's easy to identify the gap and start driving to fill it. All of the passenger vetting and geo-location reduces risk. Surge pricing helps smooth supply/demand curve. Feedback and monitoring ensure good behavior and that drivers don't skip too many rides. Right?