Matt Taibbi with some news that is making bankers very, very unhappy:

Minds are changing on Too Big to Fail. A month ago, it was just something in the air. Now, it looks like we're headed for a real legislative confrontation. And man, is the finance sector freaking.

Last week, on April 24th, Democratic Senator Sherrod Brown of Ohio and Louisiana Republican David Vitter introduced legislation called the "Terminating Bailouts for Taxpayer Fairness Act of 2013 Act," or the "Brown-Vitter TBTF Act" for short. The bill is a gun aimed directly at the head of the Too-Big-To-Fail beast.

During the Dodd-Frank negotiations a few years ago, Brown teamed up with Delaware Democrat Ted Kaufman to introduce an amendment that would have physically capped the size of the biggest banks. The amendment was bold and righteous but was slaughtered on the floor by a 61-33 margin, undermined by leaders of both parties – 27 Democrats voted against it.

Brown-Vitter offers a different and, in a way, more elegant solution to the problem than Brown-Kaufman. Rather than impose size limits, it simply insists that banks with over $500 billion in assets maintain higher capital reserves than are currently required. Companies like J.P. Morgan Chase, Wells Fargo, Morgan Stanley, Goldman Sachs, Citigroup and Bank of America will have to keep capital reserves of about 15 percent, about twice the current amount.

The bill only has such tough requirements for just those few megabanks, which sounds unfair, except that the aim of the bill, precisely, is to level the playing field. Right now, the biggest U.S. banks enjoy a massive inherent market advantage in that they're able to borrow money far more cheaply than other banks, because everybody on earth knows the government will never let them fail and will always bail them out in a pinch, making their debt essentially U.S.-government guaranteed. Studies have shown that these banks borrow money at about 0.8 percent more cheaply than other banks, and that this implicit government subsidy is worth about $83 billion a year just to the top 10 banks in America. This bill would essentially wipe out that hidden subsidy and make the banks bailout-proof.

As soon as Brown-Vitter was introduced, a very interesting thing happened. The Independent Community Bankers of America, or ICBA, issued a press release boosting the bill. "ICBA strongly supports this legislation," the release read, "and urges all community banks to join the association in advocating passage of legislation to end too-big-to-fail."

This was a big thing. It was the first time since the crisis that a prominent financial industry group opposed the will of the TBTF banks. I remember covering Dodd-Frank and being told by a number of members in the House and the Senate that the sentiment of many community bankers was for breaking up or at least curtailing the power of companies like Chase and Bank of America, but that the community banking lobby was not yet prepared to take that step.

But now, after the London Whale, the LIBOR scandal, the outrageous HSBC settlement and nearly five years of rapacious market-dominating behavior by these state-backed banks, the community banks have finally split off from TBTF.

This is another in a series of defections on this issue that in the past year has included many Republican politicians, numerous important financial regulators (even the New York Fed has taken a semi-stand against TBTF) and, hilariously, the creator of Too-Big-To-Fail himself, former Citigroup CEO and legendary lower-Manhattan raging asshole Sandy Weill. Weill was the man for whom the Glass-Steagall Act was repealed back in the nineties, so that his already-completed Citigroup merger could be legalized. But even he came out last year and said we have to break up the banks.

Naturally, there was going to be a response to Brown-Vitter from Wall Street. And we got it last week, shockingly not from one of the banks or a lobbying firm connected to the banks, but from the Standard and Poor's ratings agency – supposedly a strict, humorlessly conservative auditor that should always abhor risk and look favorably upon greater safety and security. The very fact that such a company came out against a bill forcing banks to have safer balance sheets is in itself absolute proof of how completely fucked and corrupt our current system is.