That does make sense... but if someone is smart enough to go to an Ivy League school then there is certainly going to be some financial aid in the cards that would make such an education affordable. If someone has to pay full MSRP for an Ivy League education, that person probably does not belong there in the first place.
That being said, while Ivy League grads may have it in the cards to earn more, that doesn't mean that a person with drive and ambition who lacks a degree or who has a degree from a "lesser" school is relegated to a life of not making a good amount of money, either.
Oh without a doubt. However, I'm a firm believer that exceptions never prove rules, so I'd advise any young person to get the best education from the best school they can afford. It makes the odds of a successful career much more likely.