> Certainly. And we change those laws over time to reflect changing circumstances.
Which would be quite different from the article's positioning that acts entitled to that money in the first place. But at that point, it would be reasonable to ask why such a change should target non-profit educational institutions in particular, rather than non-profits in general. (Obvious answer: because that would be wildly unpopular, and would threaten some of the primary organizations that non-profit laws were created for, which have enormous lobbying power.)
> That blanket statement is as true as the statement that companies have no problem spending more money than they have.
And those companies doing so typically go out of business, which is strong encouragement not to do that. Government departments have no such controls or requirements in place to enforce fiscal responsibility; when they spend more than they have, they still get more to spend in the future. And lo and behold, they often demonstrate extreme fiscal irresponsibility.
> I mentioned Cooper Union as an example of how non-profit universities are also not immune.
And they very nearly went under due to (as far as I can tell) epic mismanagement, yes. Mismanagement occurs in many places. It's worse when it happens with other people's voluntarily donated money, and even worse when it happens with taxes.
> Who am I likely to believe more, you or Piketty?
I'm hardly the first or only person to argue against what is commonly euphemized "wealth redistribution" on moral/ethical grounds. Whether you're inclined to believe those arguments depends rather heavily on your political beliefs and morals, as it's a question not solely decidable based on economics. Sounds like you've already made up your mind that "wealth redistribution" is acceptable to you, which is a political viewpoint, not solely an economic one.