A lengthy series of X posts attacking Social Security as a "nightmare" caught the attention of the platform's mega-billionaire owner, Elon Musk, who could soon take aim at the beloved New Deal program as co-chair of an advisory commission tasked with identifying federal spending to slash.

"Interesting thread," Musk, the world's richest man, wrote late Monday in response to the posts by Sen. Mike Lee (R-Utah), who once said he hopes to pull Social Security "up by the roots and get rid of it," along with Medicare and Medicaid.

In his new thread, Lee characterized Social Security—which lifts more Americans above the poverty line than any other federal program—as a "tax plan" insidiously disguised as a retirement plan and condemned the Social Security Act of 1935 as one of many "deceptive sales techniques the U.S. government has used on the American people."

Max Richtman, president and CEO of the National Committee to Preserve Social Security and Medicare (NCPSSM), replied Tuesday that Lee's posts amount to "a misrepresentation of Social Security's history and how the program works."

"There is nothing deceptive about Social Security. The social insurance program has been working just fine for nearly 90 years and has never missed a payment," said Richtman. "The kind of propaganda Sen. Lee posted undermines public support for Social Security, making it easier to cut or privatize the program. It is perhaps no coincidence that Sen. Lee's second-biggest campaign contributor by industry is the securities and investment sector."

Lee also claimed the federal government "routinely raids" the Social Security Trust Fund—a longstanding and misleading right-wing talking point.