<prompt> Translate the following text to EnglishWakosoaji wa utafiti wa Wachter wa awali wanadai kwamba wanapuuza ukweli kwamba Huduma ya Posta hulipa wachache sawa na inalipwa wanaume weupe.  <response>: Critics of previous Wachter studies claim that they ignore the fact that the Postal Service pays minorities the same as it pays white males. 