Social Security Disability Insurance (SSD or SSDI) is a payroll tax-funded federal insurance program of the United States government. It is managed by the Social Security Administration and designed to provide income to people who are unable to work full time.
You can’t sue your employer for pain and suffering and all the other injuries because there’s an exclusivity provision of a
workers compensation laws which give immunity to employers. The reason why lawmakers put that protection in is so that everyone would get covered — all injured workers, not just the ones in unsafe conditions. But the employees waive their right to sue for pain and suffering.