Re: The Knowledge
I disagree.
1) most places in Europe require a different driving license and/or better insurance cover when you provide transport to the public. In my opinion for good reason.
2) if you fly in for a business trip, you do not realistically check the taxi company beforehand. There is a value in being able to believe that a local licensed taxi (more or less) sticks to minimum standards.
3) The idea of limiting number of taxi licenses is that drivers can make a living - and that the risk of loosing the privilege of a license helps them behaving. Even as it is, I don't think it is easy money (in most places) and there are already drivers finding "scenic routes" for tourists.
I am fine with modernising the way you book transport - just don't chuck out the baby with the water.