One of the biggest problems of this (as has been discussed before) is that recruiting applicants on a quota system of positive discrimination result in one of two things. Either a higher failure rate or a changing of standards. Neither of these is beneficial. A higher failure rate just confirms that this job is not for this area of the population thereby further reducing the applicant numbers from this demographic area. A changing of standards, in as much as a lower of standards, is not something that is desirous in any area, whether military or commercial.