Employers shifting externalities onto employees is something that labor law has been created to mitigate for decades.
The fact that Uber has found a loophole (which is being closed quickly) does not make it "okay, because it's consensual".
Also, I have issues with semantically null statements that could have been written by a Markov Chainer that's seeded with text from the Mises Institute, but that's a more personal problem.
