I think the whole argument of "unicorns exploiting legal grey areas" falls victim to Hanlon's razor. I don't really believe these companies set out to bend or break any laws, it was more a case of the legal system not catching up fast enough. Uber started as a service to hire limousines, not a platform company.

If governments weren't so concerned with party politics, infighting and staving off populist surges, we'd probably have a proper definition for a "gig economy" worker by now. A definition that would allow them to keep the flexibility that they appreciate so much, whilst still having proper worker protections for sick pay, holidays and all the rest.