Is getting to Ivy League Schools important?

Sometimes I think why anybody has to regret on not being selected by any of these Ivy League schools. I don't think everyone who graduated from here got the best of the jobs. If we look at the world's richest (or say successful) businessmen in the world, none has really graduated from these schools. Ok, some of them do, however; we should know that these people have natural entrepreneurial ability to become successful and that's why they are selected. Bill Gates (Harvard Dropout) made his fortune without graduation. Warren Buffet (world richest at present) doesn't have degree from Ivy League school. So I beleive, if we are capable of doing something different, we can do it by graduating from common business school.

You have asked the same question that I have been asking for couple of months now. As I've finished my bachelor, I am seeking for good MBA program. After brief research, I came to know that MBA from Ivy League schools have high reputation. Even if you have money, the chance of getting admission is low because of high frequency of students looking for the same opportunity. So, the competition is high. So sometimes i think, is it really necessary to study in these schools? What is the quality of the education provided by the second tier business schools and other schools accredited by ministry of education? Do they provide the equal job opportunities for their graduates? I wonder if I keep on trying for Ivy league schools or just get admission in other schools.