I used to be an academic, with industrial research projects, for some time, so I'm relatively confident I understand how academia works.
1. I wasn't suggesting at all that academic research isn't paid for. Clearly the people doing the work somehow earn money and make a living, some of them exceedingly well. Nowhere was I suggesting that people do academic research for the pure love and charity of giving stuff away for free.
2. In large part, everyone gets to share and benefit from their output -- and most of those benefiting would have had no direct financial involvement with the work.
So, here we have a model where the product is available for free while the creators somehow earn a living (probably by being domain experts or by knowing how to apply their free "product" in the context of something more specifically revenue generating).
How is there not a correlation with; and a counterexample to; some of the arguments from the parent comment?