"... crimp spending on student aid or faculty research, but wealthy individuals can make the same argument: Higher taxes would reduce the amount of money they can invest in tech start-ups or other economically productive ventures." Clearly this is not the same argument at all. Student aid, and academic research are not the same as funding a startup. The difference is that colleges, or large grant-making foundations p…
https://en.wikipedia.org/wiki/Stichting_INGKA_Foundation
Said foundation had an estimated endowment of $36 billion in 2006 (undoubtedly much larger now), yet it only donated $159 million in 2017, or only 0.4% assuming the endowment had zero growth.