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"Extraordinarily, this debate is occurring at the very moment the Fed — shackled by its bloated asset holdings and the resulting excess reserves of the banking system — has less ability to control interest rates than it has had in its entire 105-year history," Gramm wrote.

The issue is the balancing act the Fed must perform as it seeks to normalize policy from the extreme accommodation of the financial crisis and the years after.

The Fed is both raising rates and reducing bonds it holds on its balance sheet, and in 2018 ran into an issue in which the benchmark funds rate veered close to and eventually matched the same level as the interest the Fed pays on excess bank reserves. Gramm pointed out that should the market rate banks can make on loans exceeds the level the Fed pays on reserves, it could result in an explosion in the money supply that would drive inflation.

"[T]he danger posed by the Fed's bloated asset holdings and the resulting massive level of excess bank reserves is that with a full blown recovery now under way, the demand for credit will accelerate and force the Fed to move quickly to raise interest rates on reserves or sell securities to sop up excess reserves," Gramm and Savings wrote. "A small error by the Fed in following market interest rates could cause a large change in the money supply."

The op-ed places much of the blame for the current situation on "monetary excesses" during former President Barack Obama's administration.

Gramm himself, though, has often been cited by critics for contributing to the financial crisis. He advocated the repeal of the Glass-Steagall Act that had mandated the separation of retail and investment banking, and pushed for deregulation of...

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