<prompt> Translate the following text to EnglishKwa njia ya uhakika zaidi kwa serikali ya shirikisho kuathiri akiba ya kitaifa ni kupitia sera ya kifedha ya shirikisho, haswa katika kile inachagua kufanya na ziada za bajeti zilizotazamiwa katika muongo ujao.  <response>: As we have reported in the past, the surest way for the federal government to affect national saving is through federal fiscal policy, particularly in what it chooses to do with the budget surpluses projected over the next decade. 