In my experience researchers that get a lot of grants are able to fund lots of projects, which leads to smart people working for you, which leads to big publications, which leads to more grants. Nobel/Lasker/Name-your-prize winners are just some of the people at the top of the grant pyramid. In fact, I'd argue that who wins a Nobel is a bit of a stochastic/political process, there are tons of scientists who made Nobel-worthy contributions that never won one.
That said, the outcome ends up being the same. Big/well funded labs tend to be started by smart people who had the advantages at big/well funded labs and the cycle continues, but I think the way things are funded is a big part of how that system works, not the inherent smarts/brilliance of the Professor.
Also it's not about pooling money. I think the OP is making a comment on effectiveness for educating people. For example, Cooper Union, an exceptional institution in NY that has a history of training people to an MIT-level for essentially free has come upon hard times and has somewhat abandoned that free-education principle (granted this was due to some financial mismanagement, but a big donor could certainly force changes there). This was an institution that taught many disadvantaged students, particularly from the NY area who couldn't afford MIT and its compatriots. Perhaps the money would have had far more impact there? Or what about offering massive scholarships to people attending community colleges who have a helluva GPA but need help for childcare?
$140M is an incredible gift, I can't help but think there are better ways to spend it than giving it to an institute that already gets massive amounts of grant and other money. Maybe a place that could really use it to help those that need it most?