Any of us paying into social security retirement also pays a small premium for ‘Disability’ insurance. It is “Insurance”. Social Security Disability is not welfare. The premiums are relatively small because benefits are payable only if you become incapable of gainful employment for a year or more. Illnesses (including psychological illnesses) or injuries, or any combination of these might render someone unable to continue in the work force. Generally, this is a benefit none of us ever wants to have need of. We all pay the premiums just as we pay our car and health insurance premiums. We hope to not need the benefits, but we pay the premiums in case we do. All of us would rather work than be disabled. If unfortunate circumstances take you out of the work force will explain the process and work to see if you qualify for Disability.