Thank you for your question.
I'll reframe the findings to be more specific. What we are seeing at the organizational level is that the better funded a university is overall, the higher the cost of the published papers. In the literature, one of the hypotheses to explain the diminishing returns is that we need more researchers to make more discoveries. My colleague Ms. Poncelin de Raucourt spoke about this earlier.
As a professor, I have a limited number of hours in my week. There are only 24 hours in a day for everyone. If I'm given more money, I can't necessarily work more. In that case, the money should be given to someone else. If we want to make even more discoveries, giving researchers minimal amounts of funding is not what we should do. We need to spread funding across more researchers, but adequate funding, of course. That way, we can produce more research.
For example, a $100,000 grant given to a large university is a drop in the bucket. However, giving the same amount to a smaller university can really make a difference.