As billionaire Trump advisor Elon Musk continues to fire staff, cancel contracts, and eliminate office leases across the federal government, retirees, Social Security advocates, and Democratic politicians are fretting about what could happen to the agency that delivers cash benefits to some 73 million Americans each month—one charged with paying out $1.

Musk warned federal employees over the weekend that non-responses to the email would "be taken as a resignation."

Billionaire Elon Musk has said there is widespread fraud taking place in the payment of "federal entitlements" like Social Security. Social Security benefits are paid to more than 70 million Americans on a monthly basis, and help form the bedrock of income for many retirees, survivors of deceased claimants and disabled people.