the Constitution's elaborate systems of power and representation were designed to protect the interests of the rich.
Charles Beard made the argument that the Framers of the Constitution were primarily concerned with protecting their economic interests. Beard was an American historian.
That unemployment came not from overproduction, but from a decline in demand.
Charles Beard argued that the heart of government in the United States started at the municipal level. Charles Beard also argued that history would repeat itself if people were not of a mind to change.
The antifederalist argued about the constition
Economist John Maynard Keynes argued that deficit spending was the best way to address a long-term economic depression. His policies are collectively known as Keynesian economics.
Charles Beard argued that "an economic document drawn with superb skill by men whose property interests were immediately at stake." Source American government book.
I believe you may be thinking of John Maynard Keynes, an English economist who argued in The General Theory of Employment, Interest, and Money
Of Individual Rights
Federalists
George Mason
The Antifederalists' most effective criticism of the proposed Constitution was their concern over the potential for a strong central government to infringe upon individual liberties and states' rights. They argued that the Constitution lacked a Bill of Rights to explicitly protect citizens' freedoms, which they believed was essential to prevent tyranny. This fear of centralized power resonated with many Americans, leading to significant debate and ultimately the inclusion of the Bill of Rights as a compromise to secure ratification.
Alexander Hamilton.