Elon Musk, appearing for the third time on Joe Rogan’s podcast, repeated the idea that “waste, fraud, and abuse” are running rampant in the federal government, notably in the Treasury Department.

Musk, who heads the Trump administration’s Department of Government Efficiency but officially serves as an adviser, according to the White House, said his work would save the United States an estimated $100 billion per year through changes to the Treasury Department’s payment categorization codes. He claimed that these codes, which are used to identify where department transactions are being made, right now are “basically untraceable blank checks.”