A fifth of the jobs slashed at the Department of Health and Human Services were actually a mistake, Health Secretary Robert F. Kennedy Jr. said . Under the direction of Elon Musk’s Department of Government Efficiency, the health agency fired some 10,000 employees this week in an ongoing government reduction effort that Kennedy has said could downsize his department’s 82,000-employee workforce by as much as a quarter. But by Kennedy’s own admission, that process is apparently so haphazard,