The railroad unemployment insurance system, like the railroad retirement system, was established in the 1930s. The Great Depression demonstrated the need for unemployment compensation programs, and State unemployment programs had been established under the Social Security Act in 1935. While the State unemployment programs generally covered railroad workers, railroad operations which crossed State lines caused special problems. Unemployed railroad workers were denied compensation by one State because they became unemployed while working in another State or because their employers had paid unemployment taxes in another State. Although there were cases where employees appeared to be covered in more than one State, they often did not qualify in any.