In the United States i suspect some portion of this is due to "legacy" admissions whereby some child is admitted to a competitive program or given very advantageous scholarships not because of their hard work and displayed competence, but because of their parents. I know that it will be very possible for my children to end up at ivy league if they take the legacy advantage I've given them, even though ivy league has been completely off the table for me my entire life. They'll start _much, much_ higher on the ladder than I could.