Richard Cordray asked Federal Reserve Chair Janet Yellen for $217 million in October—his last such request as director of the Consumer Financial Protection Bureau. Last week Mr. Cordray’s acting successor, Mick Mulvaney, made his first quarterly funding request: “$0.” What a difference a few months make.

Established in the wake of the 2008 financial crisis according to now-Sen. Elizabeth Warren’s vision, the CFPB ran wild under Mr. Cordray’s leadership—issuing reams of punishing regulations and conducting endless fishing...