Sen. Bernie Sanders (I-VT) is planning to introduce artificial intelligence legislation that would impose a “robot tax” on large corporations that replace workers with AI or automation.

Sanders, the ranking member of the Senate Health, Education, Labor, and Pensions Committee, released a lengthy op-ed this week. In it, he takes a skeptical look at the rise of AI and argues that more should be done to ensure billionaires don’t benefit at the expense of workers. One idea he mentioned is a robot tax.