WASHINGTON ― The Social Security Administration is planning a massive reorganization that will involve “significant workforce reductions,” it told employees Thursday.

Ahead of the restructuring, part of billionaire Elon Musk’s broader shakeup of the entire federal government, the agency offered buyouts to all its employees.

“Through these massive reorganizations, offices that perform functions not mandated by statute may be prioritized for reduction-in-force actions that could include abolishment of organizations and positions, directed reassignments, and reductions in staffing,” the agency said in a staff-wide email it also posted on its website.

Federal courts have thrown up roadblocks to the Trump administration’s efforts to trim the federal workforce, with a judge on Thursday saying the administration’s recent mass firings of probationary employees were illegal.

The Social Security Administration runs one of the federal government’s most popular programs ― retirement benefits for 50 million older Americans ― on a shoestring budget, with administrative costs totaling just half a percent of agency expenditures. Even though cutting staff doesn’t cut benefits, the reorganization will be controversial.

In response to reports that cuts were coming to the SSA, House Democratic Leader Hakeem Jeffries (D-N.Y.) said earlier on Thursday that “the Trump administration is putting Social Security benefits at risk by firing the staff who help beneficiaries and closing down the offices that serve communities across the country.”

President Donald Trump has repeatedly vowed not to cut Social Security benefits, but he and Musk, a senior White House adviser who is also the world’s richest man, have falsely claimed the Social Security Administration issues fraudulent benefit checks to millions of dead people.

In its email, the SSA said it might reassign employees “from non-mission critical positions to mission critical direct service positions,” such as answering phones and staffing field offices.

“Reassignments may be involuntary and may require retraining for new workloads,” the agency said. In the meantime, all staff will be eligible to take buyouts.