During a recent commencement speech at Harvard, Facebook billionaire Mark Zuckerberg came out in favor of a system in which all people receive a standard salary just for being alive, no questions asked.

The system, known as universal basic income, is one of the trendiest economic theories of the past few years. Experiments in basic income have popped up in Kenya, the Netherlands, Finland, Canada and Oakland, California, among other places, according to the Business Insider’s Chris Weller.

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