Two leading IMF officials, the former Vice President of the Dallas Federal Reserve, and the the head of the Federal Reserve Bank of Kansas City have all said that the United States is controlled by an oligarchy.
The Too Big Too Fail banks have been extremely generous contributors to virtually all members of Congress on committees dealing with financial matters. Now why do you suppose they would want to do that? And why is it legal for members of Congress to take money from companies with a direct interest in the bills they pass or reject? In any other place, this would be called a conflict of interest with the payments assumed to be money spent for actions delivered.