An ethical person - like a politician, banker or lawyer - may know right from wrong, but unlike many of them, a moral person lives it. An Americanist first already knows that.
Bankers and their government agents will always act in their own best interests. Any residual benefit flowing down to the citizens by happenstance will just be litter.
Freshmen in the US House Of Representatives learn very quickly that they need a lot of money to stay in power, as explained in a New York Times piece highlighting how Congressman in both parties are bought.
The Young Turks host Cenk Uygur breaks it down.