that still depends on them having fiat as the primary money, which is not the case after it fails and enough adoption has led to people generally preferring bitcoin and lightning etc
their control depends on their ability to dictate the interest rate, which should be dictated by the actual market in credit, in a full reserve system
fractional reserve is a fraud, it is counterfeiting, it is a hidden tax, and eventually, like all scams, will become widely understood and any purveyor of it will be shunned and prosecuted