<prompt> Translate the following text to EnglishKama huwezi kurudi nyuma katika wakati, kupunguza kiwango cha kodi juu ya faida ya mtaji ya sasa haiwezi kuongeza uwekezaji katika rasilimali za uzalishaji.  <response>: Unless you can go back in time, cutting the tax rate on existing capital gains cannot possibly increase investment in productive resources. 