California billionaires are spending big to kill a tax meant to fund health care CalMattersCalifornia ‘billionaire tax' makes ballot despite opposition from tech moguls The GuardianCalifornia billionaires tax qualifies for ballot, setting up costly fight PoliticoTaxing the rich is getting more popular. Here's why California's proposal lost steam anyway. Business InsiderBillionaire Tax Officially Has Enough Signatures for California Ballot
