Philosophy, brought afresh to repute by Kant […] had soon become a tool of interests; of state interests […] The driving forces of this movement are, contrary to all these solemn airs and assertions, not ideal […] Party interests are vehemently agitating the pens of so many purer lovers of wisdom […] truth is certainly the last thing they have in mind […] Philosophy is misused, from the side of the state as tool, from the other side as means of gain […] Governments make of philosophy a means of serving their state interests, and scholars make of it a trade.

Arthur Schopenhauer (1788-1860) German philosopher

(Attributed)
    (Source)

Criticizing Hegel and Hegelianism, and the latter's state-philosophy alliance. Attributed in Karl Popper, The Open Society and Its Enemies, ch. 12 (1945).