The ballot measure, known as Proposition 22, would establish drivers as an independent class of workers with access to limited job benefits, along with wage and worker protections they’ve so far lacked under the gig economy model. Labor groups and many of driver advocates say the companies’ efforts, however, do not go far enough to protect workers and are merely an attempt, cloaked in friendly marketing materials, to quash a new law that would guarantee drivers access to the minimum wage, employer-provided health care and bargaining rights.

Drawing on a more than $186 million campaign war chest that Uber, Lyft, food delivery app DoorDash and other tech companies have raised, they are seeking to convince California voters that the ballot initiative reflects the will of drivers. They’ve cited limited survey data saying the vast majority of drivers want to remain contractors.

But critics see the measure as a last-ditch effort