Bill Gates is not impressed by Elon Musk’s work with the Department of Government Efficiency. In an interview with the Financial Times, he described Musk’s work as hurting the most vulnerable people on the planet.

The Microsoft co-founder and philanthropist condemned his fellow billionaire for overseeing deep cuts to the U.S. Agency for International Development in the Trump administration.

The picture of the world’s richest man killing the world’s poorest children is not a pretty one,” the Microsoft mogul said bluntly.