Assuming "rich guys" wanted to fund education.....

...wouldn't they have done so all ready? Barring notables like Carnegie and Smithson, the vast majority of the rich understand that education and knowledge is critical to remaining rich. In a capitalist, zero-sum system, a dollar in my pocket is a dollar out of yours, so why would they want to encourage possible competition?

Much better to keep the kids dumb, because then they'll be much more loyal workers.