It 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.

On the one hand, it's a way to reduce poverty, but tech folks also see it as a way to solve the growing problem of robot automation. That issue hits close to home for many of them, because they are the ones largely driving this robot revolution.

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