In California, a recent proposed ballot measure would tax billionaires 5% of their net worth. The proposal, which needs nearly 1 million signatures to make it onto the ballot come November, has sparked conversations about inequality, wealth flight, and the future of Silicon Valley: will tech founders stay in a state ruled by the fickle whims of the masses? There’s been less attention, however, on the architects of the proposal themselves: who they are and what they want.