The U.S. government is prepared to provide more than $7.76 trillion on behalf of American taxpayers after guaranteeing $306 billion of Citigroup Inc. debt yesterday. The unprecedented pledge of funds includes $3.18 trillion already tapped by financial institutions in the biggest response to an economic emergency since the New Deal of the 1930s, according to data compiled by Bloomberg. The commitment dwarfs the plan approved by lawmakers, the Treasury Department's $700 billion Troubled Asset Relief Program. Federal Reserve lending last week was 1,900 times the weekly average for the three years before the crisis. When Congress approved the TARP on Oct. 3, Fed Chairman Ben S. Bernanke and Treasury Secretary Henry Paulson acknowledged the need for transparency and oversight. Now, as regulators commit far more money while refusing to disclose loan recipients or reveal the collateral they are taking in return, some Congress members are calling for the Fed to be reined in. Whether it's lending or spending, it's tax dollars that are going out the window and we end up holding collateral we don't know anything about," said Congressman Scott Garrett, a New Jersey Republican who serves on the House Financial Services Committee. "The time has come that we consider what sort of limitations we should be placing on the Fed so that authority returns to elected officials as opposed to appointed ones."