The California measure that legalizes gig economy companies to keep workers as independent contractors just passed a major test, with the state Supreme Court throwing out a challenge. Prop 22 was crafted to dismantle a state law: California had previously passed legislation to make gig workers employees and allow them some of the benefits given to full-time workers. But Prop 22 passed with 58% of the vote in November, nullifying the law and formalizing the previous independent contractor status of such workers.