Private central bank = government corruption
Thomas Jefferson already knew it back in 1818:
"Hamilton's financial system had … two objects; 1st, like a puzzle, to exclude popular understanding and inquiry; 2nd, as a machine for the corruption of the legislature… And with grief and shame it must be acknowledged that his machine was not without effect; that even in this, the birth of our government, some members were found sordid enough to bend their duty to their interests, and to look after personal rather than public good.”
Jefferson then goes on to explain what the engine was of this corrupting machine:
“[Its] engine was the Bank of the United States.”
Sauce: The complete anas of Thomas Jefferson. https://archive.org/details/bub_gb_MAY7sx5IBloC pages 30 and 35