I make a habit of talking to taxi drivers about Uber. Consistently they say they drive taxis because there is no money in driving for Uber (which of course that tells us less than it seems, because they are self-selected to be people who prefer driving taxis). One told me something new: I asked, as I often do, if they don't make money then why are there so many Uber drivers?
This man said that some Uber drivers are trapped by car loans: They are working-class people who took out loans to buy their Uber cars. All cars lose value the moment they are driven off the lot and these cars are driven hard and for high mileage, so their resale value is low. He said these drivers keep working for Uber because they have to try to pay off the loans. (I know nothing else about that story other than what one random driver told me; I'm hoping others can contribute some better knowledge about it.)
It struck me: Not only does Uber treat their workers like contractors and give them no benefits or other employee protections, but they ask (often) working class people to provide Uber's capital. Arguably, it's like General Motors calling factory workers 'independent contractors' and asking them to bring their own machinery. In contrast, taxi drivers lease the cab for a shift, AFAIK; they have no long-term capital investment or debt trap. It's almost as if Uber's main business proposition is a loophole in labor rules that allows them to shift almost all costs onto their own workers.
That said, I hesitate to pile on, even for a company I don't like personally (which is why I take cabs). Let's not let the hype exceed the reality.
EDIT: A few clarifying edits