In the interest of historical accuracy, Newton's work was directly and indirectly subsidized by his government as was the university he attended (that later gave him partial scholarship). He invented Calculus while isolated due to the plague, but had already graduated by then with those scholarship bucks from a university chartered by the British government.

A lot of his work occurred while he was what we'd now call a tenured professor of mathematics, again at a universe with an impressive amount of money being donated directly by the British government.

In general, the history of higher learning is the history of governments (or the wealthy people who constitute them) funding research and facilities. You may not like it, but you shouldn't misrepresent history just to make your preferences sound more normal.