Uber crisis: What's real problem - Kalanick or Silicon Valley biz model?

The vision of society Silicon Valley firms are creating should not be accepted at face value

It would be nice to think that Uber’s problems are going to be fixed with the resignation of its CEO Travis Kalanick. Of course, the shareholders who instigated the demand for his resignation were not necessarily expressing a view about what he had done but merely that the company was spending more time focusing on its internal toxic culture than its actual business of expanding its taxi and delivery services.

What hasn’t been brought into question, despite Uber’s lack of integrity in all other areas, is the ongoing validity of the entire model on which Uber is based,