Obviously hard objective criteria are not be enough to get into Harvard, and they need to dip into subjectivity which is rife with bias. The only fair solutions are to make the SATs harder (Havard can't control this) or expand the university and accept more students and make the school larger.
It boggles my mind why they don't expand the school. The US population and GDP increase, the demand for education and exemplary leaders in society increase, Harvard's endowment and prestige increase, yet their class size remains the same. I'd say they have an obligation to increase class size.