As the other commenter did I might quibble with your description of them as a monopsony, but I think the spirit of your criticism is valid. And I agree, I thin

As the other commenter did I might quibble with your description of them as a monopsony, but I think the spirit of your criticism is valid. And I agree, I think we should think very carefully about how these companies are taxed and regulated, because ultimately it does make sense for them to consolidate to a single provider. Especially so once they start using self-driving cars and stop employing drivers at all. I think what we need to think very carefully about is how we distribute and deal with the gains of this massive step-change in efficiency we are about to experience / are experiencing. What we must not do though is allow fears about those gains to prevent us from attaining them. In other words, if you're worried about the plight of laborers or drivers, tax Uber and just give them the money. Don't enact protectionist policies for the taxi industry.