Google cofounder Sergey Brin contributes $82 million to oppose California’s proposed billionaire tax, according to reports that also describe a broader coalition of wealthy backers. Alongside Brin, the effort includes 11 other billionaires and prominent figures from the tech sector, who are coordinating to counter the measure as it moves through California’s political process. The funding is presented as part of a campaign aimed at influencing public opinion and the outcome of the proposal. California’s plan would target ultra-wealthy individuals with additional taxes tied to their wealth or income, though specific mechanics are not detailed in the provided summaries. The reporting characterizes Brin’s involvement as part of a larger effort by the same group to undercut the proposed tax’s viability. Taken together, the sources indicate that the billionaire tax proposal faces organized opposition supported by substantial contributions from top tech-linked wealth holders, including Brin, and that the campaign is funded on a scale intended to affect the legislative and public debate.