Right, I wasn't proposing a completely-unregulated market. Presumably collusion and other anti-competitive behavior would remain illegal. In any event, differ

Right, I wasn't proposing a completely-unregulated market. Presumably collusion and other anti-competitive behavior would remain illegal. In any event, different behaviors towards fluctuating prices are already observable as differentiators amongst different competitors in this space (Lyft has surge pricing, but it's less aggressive, and Sidecar lets drivers set their own prices rather than controlling it centrally). What evidence is there to suggest that that would stop once cabs disappear?