In 2012, Californians voted on Proposition 30, which raised taxes on the richest citizens in order to raise funding for public schools and charter schools. The measure passed, despite a well-funded effort to defeat it.

A group of unions and progressive activists released a list of nearly 80 wealthy Californians who secretly funded the campaign to defeat Proposition 30. One of them was billionaire Eli Broad, who publicly supported Prop 30 but donated either $500,000 or $1 million to the effort to defeat it.

The progressive activists–called California Hedge Clippers–dug into records to show where the money came from to fight the temporary tax to aid schools.

Individuals named in the group’s report include Silicon Valley tech and investment executive John H. Scully ($500,000), investor and Hyatt Hotel heir Anthony Pritzker ($100,000), developer Geoff Palmer ($100,000) and private equity investor Gerald Parsky ($50,000).

Donors, regulators concluded, contributed money to an…