Article 2 says “the executive Power shall be vested in a President of the United States of America.” That means the power to “enforce laws, manage national affairs, and oversee government agencies.”

It’s Congress’s role to allocate funds to certain purposes, and the President’s to “take Care that the Laws be faithfully executed,” including overseeing the bureaucracy that implements them.

The President already has dictatorial power over the bureaucracy, as per the Constitution.