To be honest, this just sounds like a bunch of hand-wavey excuses as to why someone shouldn't be paid more when the value of what they're doing goes up.
Where do you see that the value of driving for Uber has gone up? I'll grant you that Uber customers are valuing the services more, but how much of that "value" should be going to the drivers vs. the programmers and support staff? How much should be divided among the accountants and cleaning staff at Uber offices? More importantly, who should be the one deciding what the most effective distribution of "value" should be -- maybe Uber should democratize it and ask you to vote on companywide compensation through their app? Let's cross our fingers their users have done their homework before voting, else the drivers and everyone else will have to find new jobs.