Beauchamp Himself Implicitly Recognizes the Moral Wrongs in Preferential Policies

Beauchamp himself implicitly recognizes the moral wrongs in preferential policies surrounding affirmative action. As a result, the argument being made is that practices of preferential treatment are often the lesser of two evils in the pursuit of the goals of affirmative action. How does Beauchamp imply that the goals of affirmative action are sufficient to justify the potential harms caused by employing preferential practices.What are the moral foundations that are used to defend and justify preferential treatment for disadvantaged groups as a part of affirmative action policies