Thank you for your question.
It's a bit complicated, because obviously the people at the University of Toronto and McGill University who receive those grants will tell you that they're excellent, and that that's why they receive more grants than the people at the Université du Québec à Trois-Rivières. However, since the current application evaluation process doesn't divorce CV evaluation and the prestige factor from project evaluations, it's quite difficult to know the causes of those people having more grants.
It's quite unlikely that it's their excellence per se that causes those differences, because if that were the case, that would be expected to be the case across all disciplines. As I said, the prestige element is decisive in some disciplines, but not in others. Unless the people at the University of Toronto are great at economics but horribly bad at history, the most likely explanation is that prestige plays a role in certain disciplines because of their specific history and their particular evaluation criteria. That's why there's a concentration of funding.