DAVID N. MILLER, a master of bailouts, steps to the dais and coolly explains how the financial world went crazy.

It is February 2010. The anger behind Occupy Wall Street is building. Flicking through slides, Mr. Miller, a Treasury official working with the department’s $700 billion Troubled Asset Relief Program, lays out what caused the housing bubble: easy credit, shoddy banking, feeble regulation, and on and on.

“History has demonstrated that the financial system over all — not every piece of it, but over all — is a force for good, even if it goes off track from time to time,” Mr. Miller tells a symposium at Columbia University in remarks posted on YouTube. “As we’ve experienced, sometimes this system breaks down.”

But, it turns out, sometimes when the system breaks down, there is money to be made.

Mr. Miller, who arrived at the Treasury after working at Goldman Sachs, described himself as a “recovering banker” in the video.