how would you describe the Chief Minister of State that Gulliver tells the Houyhnhnm about?

"I told him, "that a first or chief minister of state, who was the person I intended to describe, was the creature wholly exempt from joy and grief, love and hatred, pity and anger; at least, makes use of no other passions, but a violent desire of wealth, power, and titles; that he applies his words to all uses, except to the indication of his mind; that he never tells a truth but with an intent that you should take it for a lie; nor a lie, but with a design that you should take it for a truth; that those he speaks worst of behind their backs are in the surest way of preferment; and whenever he begins to praise you to others, or to yourself, you are from that day forlorn. The worst mark you can receive is a promise, especially when it is confirmed with an oath; after which, every wise man retires, and gives over all hopes."