A ballot measure targeting California billionaires with a one-time five percent tax has officially qualified for the November election.Proponents from the Service Employees International Union-United Healthcare Workers West secured the required signatures to propose the wealth levy.Governor Gavin Newsom and tech leader Sergey Brin have emerged as prominent opponents, arguing that the tax will force wealthy taxpayers to leave the state.Legislative analysts warn that while the initiative could raise immediate funds for healthcare, it threatens the long-term stability of income tax revenues.