Social Security is often thought of as the law that pays people during their retirement. This was the first and most notable accomplishment of Social Security. Every employed person in the United States pays a portion of their income into the Social Security coffers, and that money is then paid out for retirement. However, it became apparent that the pool of money from Social Security could be used for other purposes as well. Through subsequent amendments and revisions, the Social Security Administration was placed in charge of certain types of disability. That led to SSI disability law. It is a very confusing and complex part of the law.