Getting and providing a good education is what drives the Ivy league schools. And having small teacher-student ratios is a help. But Carlo, TAU trying to match Harvard's endowments is difficult. Harvard has been around a lot longer. It was well established when John Adams was a student there in the 18th century. Harvard is also private and only recently desegregated, less than 50 years ago. I doubt that if TAU charged what Harvard does, there would be nearly as many students.
from the article: Tel Aviv is up there with Harvard, MIT and Princeton - for now.