Benoit Tessier/ReutersIt might seem odd for tech entrepreneurs to take an interest in income distribution policy. But an increasing number of high-profile Silicon Valley executives are endorsing universal basic income (UBI), a system in which everyone receives a standard amount of money just for being alive.

Virgin Group CEO Richard Branson became the latest mogul to endorse the radical idea, writing in a blog post that "most countries can afford to make sure that everybody has their basic needs covered."

On the one hand, basic income is a way to reduce poverty, but tech folks like Branson also see it as a way to solve the growing problem of robot automation, which they themselves are helping to create.

Here are some of the highest-profile entrepreneurs who have endorsed UBI.