Who first established a national banking system as treasury secretary?

Hamilton. He actually did some very illegal things while in office. The men who fought the revolution were promised land as part of the compensation for fighting. After, the war they were given a grant on paper stating the land was given them. Hamilton went to these men and bought the grants from them for less than they were worth. He also reasoned that the more people owed the government the more they want to see it survive.