Whereas traditional bike courier services offer benefits like worker’s comp to their riders, Uber offers no such protections — and can severely undercut the fees those companies must charge to make a profit. In the 1980s, the Department of Labor set industry regulations that protected riders from being classified as independent contractors so the courier services would insure them as employees — but those policies have yet to be enforced upon Uber.
My Summer Working as an Uber Bike Messenger
The Billfold
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And this is the main driver of benefit for Uber — making the worker pay for most (if not all) operational costs in the name of “flexibility”.

Add in the fact that Uber workers (not employees, as the company itself insists) have absolutely no power for collective action (set working conditions, remuneration, etc) makes this and similar companies the kind of exploitative neoliberal scum they are.