<prompt> Translate the following text to EnglishKwa urahisi, simulation ya kuokoa ziada ya usalama wa kijamii inachukua kwamba kuokoa kwa kaya, biashara, na serikali za jimbo na za mitaa inabaki mara kwa mara kama sehemu ya  <response>: For simplicity, the Save the Social Security Surpluses simulation assumes that saving by households, businesses, and state and local governments remains constant as a share of 