I think this comes back to the original statement of "It's always reasonable to expect companies to pay their people a fair wage."

This is a bit ambiguous, and perhaps it's a different reading of it that's the contention.

Expect can either mean I think it's likely, as in I expect the sun to rise tomorrow, or a requirement.

I am not surprised that uber try and pay their drivers so little, but I am disappointed and want better from them.

> I'm far from an expert of economics, but it seems like regulation is a way to change the rules of the game to have more ethical/fair/uniformly distributed equilibriums at some cost in net efficiency.

I agree. Safety regulations are a good example of this.