Cab drivers is just one small segment. That is a very good point to consider and even we, as a collective hivemind, on the HN don't pay enough attention to the problem of extreme rate at which jobs will diminish in the future. Start-ups won't solve that.

If we don't find a scalable, sustainable, viral business model to disrupt capitalism and focus on positive externalities humanity may be heading for a disaster and this one won't be a surprise.