The Public Accounts Committee has published its report on Universal Credit. It's pretty damning. There's a comprehensive account in the Guardian. Since then, there has been a concerted attempt by Conservative MPs to place the blame squarely on Robert Devereux, the Permanent Secretary at the DWP and the accounting officer for the project.
The Times said this morning that Iain Duncan Smith had tried to get Tory members of the committee to blame Devereux. That's been denied. The report doesn't blame individuals, but Margaret Hodge said this morning that the responsibility was from the top down. Since then I've heard three different Tories blame the civil servants. Francis Maude was driven to explicitly exonerating IDS. He commissioned the review in 2012, says Maude, which identified the problems; and he described him as "visionary".
Whatever happened to ministerial accountability? Younger readers won't be aware that there was a time when the ministers took responsibility and resigned even when the disaster clearly wasn't their fault. Not now. But if Devereux does go, he will be free to speak. That might worry Duncan Smith.
Many people have asked why IDS is still in his job. Surely his track record should have got him reshuffled to the back benches ages ago. My feeling is that IDS is so hated, so much the focus of people's anger at the cruelty of the welfare "reforms", that it's better for Cameron to leave him in place and let him soak it all up than to put someone else in the firing line.