That doesn't mean a bunch of bankers planned the Civil War because they were afraid of losing the cotton trade.
Bankers? As i've pointed out before, they are merely one group among many that would have been affected negatively by the South trading directly with Europe. Shippers would have lost cargoes, and likely would have had to move South. Textile manufacturers would have seen an increase in their costs. Warehousing in New York, and New York dock facilities would have a sudden collapse of business. Insurance agents would have been faced with competition from Southern industries taking over what used to be their market.
My point in linking you to the Daniel Greenfield article is to show you that other people see the same sort of movers and shakers behind the scenes who have power and influence yet who do not answer to the voters.
I say this pattern was established in the run up to the Civil War, and has been in existence ever since. We modern Americans are simply facing the same monster of Crony Capitalists influencing government policy as was seen in the 1800s. It's just bigger and wealthier now, and has somewhat gone International.