<prompt> Translate the following text to EnglishKwa kuwa watu wengi wanaishi muda mrefu, kutakuwa na wafanyakazi wachache wanaomtegemeza kila mstaafu isipokuwa mifumo ya kustaafu ibadilike.  <response>: As more people live longer, there will be relatively fewer workers supporting each retiree unless retirement patterns change. 