<prompt> Translate the following text to EnglishWakati Social Security hutoa msingi kwa ajili ya mapato ya kustaafu, kuokoa kupitia pensheni na na watu binafsi kwa niaba yao wenyewe kuchangia kwa kiasi kikubwa kwa mapato ya kustaafu.  <response>: While Social Security provides a foundation for retirement income, saving through pensions and by individuals on their own behalf contribute substantially to retirement income. 