“The evidence is in. The impacts are very real,” Gov. Gavin Newsom (D-CA) said about the billionaire tax, a ballot initiative state unions are trying to qualify for the November ballot. “It’s really damaging to the state.” Even a Democrat as left-wing as Newsom is aghast at the extremism and the power of Big Labor. It shows just how far out of touch and unaccountable unions have become. Many of California’s most successful job creators agree. Google cofounders Larry Page and Sergey Brin are in the process of leaving the state, as are Facebook founder Mark Zuckerberg, Oracle Chairman Larry Ellison, former Uber CEO Travis Kalanick, and venture capitalist Peter Thiel. The billionaire tax “will kill startups and innovation in California since a founder is illiquid while instantly on the hook for $100M,” Y Combinator...