<prompt> Translate the following text to SwahiliThose who claim to want a cut in the capital-gains tax rate because it will increase investment and not because it is a handout to the rich could gain a lot of credibility if they advocated reducing the rate only on future capital gains.  <response>: Wale wanaodai wanataka kupunguzwa kwa kiwango cha kodi ya faida ya mtaji kwa sababu itaongeza uwekezaji na sio kwa sababu ni utoaji kwa matajiri wanaweza kupata uaminifu mwingi ikiwa wangetetea kupunguza kiwango tu juu ya faida ya mtaji ya baadaye. 