For the second time this century, the Federal Reserve is a crisis manager. In this role, policymakers can lend to solvent but illiquid intermediaries (as the lender of last resort). They can backstop financial markets (as a market maker of last resort). And, when all else fails, they can take the place of dysfunctional private-sector intermediaries.

During the first financial crisis of the 21st century, the Fed’s response shifted from one role to the next as the crisis intensified. Yet, even compared to that massive crisis response, the Fed’s recent moves are breathtaking—in speed, scale and scope.

Indeed, with its most recent announcements on April 9, the Federal Reserve is committed to an unprecedented course of action to ensure the flow of credit to virtually every part of the economy. In carrying out its obligations under the newly enacted CARES Act, the Fed is effectively transforming itself into a state bank that allocates credit to the nonfinancial sectors of the economy.

Yet, picking winners and losers is not a sustainable assignment for independent technocrats. It is a role for fiscal authorities, not central bankers. Instead of using the Fed as an off-balance sheet vehicle for the federal government, we hope that Congress will shift these CARES Act obligations from the Federal Reserve to the Treasury, where they belong….