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DoorDash, UberEats, and Grubhub sue New York City over a new $18 an hour minimum wage for delivery drivers
(www.businessinsider.com)
This is a most excellent place for technology news and articles.
As I recall, the basic differences between employee and contractor are whether the employer can dictate time, place, and manner. The problem for gig "contractors" is that they're in a much tougher spot on exercising their rights, since not many people who can afford a lawyer deliver food. And they aren't exactly in short supply, so if Uber oversteps and individual "contractors" try to push back, they'll just be fired. Which gets back to the lawyer issue.
Uber, etc are very much a large enough targets for a class action lawsuit to force a behavior change.
(As an aside, I just got $137 back from the Yahoo class action suit, most I've ever seen from one)