<prompt> Translate the following text to EnglishKwa nini wakubali wakazi wa wilaya hiyo kufurahia kiwango cha kodi ya shirikisho cha, tuseme, asilimia 15, wakati wao wenyewe wanaweza kukabili viwango vya karibu asilimia 40?  <response>: Why should they allow the districts residents to enjoy a federal tax rate of, say, 15 percent, when they themselves may face rates close to 40 percent? 