Yale has unique historic and ongoing ties to the bureaucratic apparatus of the country. These have been/are exploited for the unique benefit of the institution and its associates. Harvard, (in particular some elements of the law school), are getting in on this game more on the direct "policy" level than ever historically. Take, for example, Harvard's new institutional bias toward "Lawfare."
I personally don’t think they need to do either, but one argument is that since they receive public funds, they have some duty to serve the public’s best interest.
They’re are some colleges that won’t even accept the GI Bill because they won’ don’t want those entanglements.[1] At least they put their money where their mouth is.