Banks are a special case. Much of the modern banking system would be considered fraud 100 years ago, but banks were among the first to figure out that they can

Banks are a special case. Much of the modern banking system would be considered fraud 100 years ago, but banks were among the first to figure out that they can put pretty much anything into a financial contract and it will be binding. The US literally created the FDIC because banks are allowed to gamble with depositor's money.