California and Massachusetts regulators have decided to allow Uber drivers to be considered independent contractors rather than employees, a distinction crucial to the success of the ride-sharing app. But it’s hardly the last word on the matter. The left has been vilifying Uber as the villain of the new “gig economy,” in which more and more workers-especially younger ones- support themselves as self-employed contractors, stitching together a variety of app-enabled tasks. Liberals consider such arrangements largely exploitative-with companies such as Uber getting fabulously rich while the contractors doing the work hustle, scrape, and scuffle for crumbs. Uber corporate employees, after all, enjoy fringe benefits, unemployment insurance, and job security; the drivers do not.