Just as important, Schwartz wants to ensure more equality of opportunity. A diverse student community will be better able to contribute to a diverse society. This highly desirable outcome requires some complex thinking and delicate negotiation. In the United States, well-intentioned access policies have led to emotionally-charged lawsuits and as much ill-feeling as goodwill.
US-style aptitude tests are not the answer. America has no national exam system, so has no other reliable way to compare students. Subject tests are generally better at predicting success. The biggest barrier to diversity was not in Schwartz's remit - fees and the fear of debt.