It all comes back to the SOCIAL PACT. Workers' compensation was the FIRST piece of social legislation.
All other government programs, such as social security, Medicare & Medicaid came after. BUT they are related to workers' comp and sometimes overlap.
For example: what if you are applying for social security disability and workers' comp? This is actually very common. Brian Mittman answers all your questions.
NEXT is a continuation of the miscellaneous topics–this one specifically focused on the overlap between workers' comp and state laws.