Last Wednesday, nearly lost in the furor over Rupert-gate and the debt ceiling crisis, came the surprising news that the Federal Reserve has issued a cease-and-desist order against a Too-Big-to-Fail bank. The bank was Wells Fargo, which was also fined $85 million and ordered to compensate customers it had unfairly — indeed, illegally — taken advantage of during the subprime bubble.

What made the news surprising, of course, was that the Federal Reserve has rarely, if ever, taken action against a bank for making predatory loans. Alan Greenspan, the former Fed chairman, didn’t believe in regulation and turned a blind eye to subprime abuses. His successor, Ben Bernanke, is not the ideologue that Greenspan is, but, as an institution, the Fed prefers to coddle banks rather than punish them. That the Fed would crack down on Wells Fargo would seem to suggest a long-overdue awakening.

Yet, for anyone still hoping for justice in the wake of the financial crisis, the news was hardly encouraging. First, the Fed did not force Wells Fargo to admit guilt — and even let the company issue a press release blaming its wrongdoing on a “relatively small group.” The $85 million fine was a joke; in just the last quarter, Wells Fargo’s revenues exceeded $20 billion. And compensating borrowers isn’t going to hurt much either. By my calculation, it won’t top $200 million.

Most upsetting of all, the settlement raises the question that just won’t go away: Why can’t the federal government prosecute financial wrongdoers?