I totally agree. But those CEOs, politicians and investment bankers would like their sons and daughters to attend the same Ivy-league schools and not risk them

I totally agree. But those CEOs, politicians and investment bankers would like their sons and daughters to attend the same Ivy-league schools and not risk them being outcompeted by some geeky kids from Missouri or Kansas. If that happened too often, the Ivy-league schools wouldn't get those new libraries and lecture halls, and one day the future president wouldn't be from there.