He recently weathered a firestorm over retention payments to A.I.G. executives made possible in part by language inserted in the administration’s stimulus package at the Treasury Department’s insistence. And his new efforts to restart the financial industry suggest the same philosophy that guided Mr. Geithner’s Fed years.

According to a recent report by the inspector general monitoring the bailout, Neil M. Barofsky, Mr. Geithner’s plan to underwrite investors willing to buy the risky mortgage-backed securities still weighing down banks’ books is a boon for private equity and hedge funds but exposes taxpayers to “potential unfairness” by shifting the burden to them.

The top echelon of the Treasury Department is a common destination for financiers, and Mr. Geithner has also recruited aides from Wall Street, some from firms that were at the heart of the crisis. For instance, his chief of staff, Mark A. Patterson, is a former lobbyist for Goldman Sachs, and one of his top counselors is Lewis S. Alexander, a former chief economist at Citigroup.

A bill sent recently by the Treasury to Capitol Hill would give the Obama administration extensive new powers to inject money into or seize systemically important firms in danger of failure. It was drafted in large measure by Davis Polk & Wardwell, a law firm that represents many banks and the financial industry’s lobbying group. Mr. Geithner also hired Davis Polk to represent the New York Fed during the A.I.G. bailout.

Treasury officials say they inadvertently used a copy of Davis Polk’s draft sent to them by the Federal Reserve as a template for their own bill, with the result that the proposed legislation Treasury sent to Capitol Hill bore the law firm’s computer footprints. And they point to several significant changes to that draft that “better protect the taxpayer,” in the words of Andrew Williams, a Treasury spokesman.

But others say important provisions in the original industry bill remain. Most significant, the bill does not require that any government rescue of a troubled firm be done at the lowest possible cost, as is required by the F.D.I.C. when it takes over a failed bank. Treasury officials said that is because they would use the rescue powers only in rare and extreme cases that might require flexibility. Karen Shaw Petrou, managing director of the Washington research firm Federal Financial Analytics, said it essentially gives Treasury “a blank check.”

One year and two administrations into the bailout, Mr. Geithner is perhaps the single person most identified with the enormous checks the government has written. At every turn, he is being second-guessed about the rescues’ costs and results. But he remains firm in his belief that failure to act would have been much more costly.

“All financial crises are a fight over how much losses the government ultimately takes on,” he said. And every decision “requires we balance how to achieve the most benefits in terms of improving confidence and the flow of credit at the least risk to taxpayers.”