Maybe that's what it'll take for the US to improve its public transportation. Having good ol' fashioned private enterprise instead of the government paying for it.
To be fair, these drivers would be out of jobs without Uber. They are not qualified enough to find better paying jobs. Being underpaid is still better than not being paid at all. However, there's a limit to how little Uber can pay its drivers before they start looking for better paying jobs elsewhere. Uber needs to balance this with their need to be profitable in order to keep existing. And they're not profitable already in spite of these low wages. If anything, it's Uber who needs to worry about its existence. Drivers will find jobs elsewhere.
I think Uber started as a high margin business, which is always a great place to be but they quickly turned into a (very) low/negative margin business because of competition which requires exponential growth and constant injection of money to pay for the growth. The amount of pressure on the ceo must be insane, glad I'm not in his shoes (doesn't justify him being a-hole to his driver though obviously).
Any serious driver who is full time will most likely move up to the black cars and get private clients over time.
I had a driver in a brand new Mercedes Benz. He was an older gentleman, that owned three existing companies, and drove for Uber for fun, donating his paychecks to a local community organization.
Friend of my brother bought a van specifically to use for Uber. He is a married stay-at-home dad, and his wife is a practicing MD.
Uber is already hiring lobbyists with the goal of boondoggling municipalities into providing Uber subsidies in lieu of investing in public transit. They talk a big game about how self-driving cars are what's going to make Uber profitable, but that's just marketing to earn some 'cool points' because that tech won't be ready before the VC funding runs dry. They're banking on public subsidies.