The standard rap against regulation is that government uses a meat cleaver to clean up problems in the private sector that are better tackled with more nuance.
Yet regulation—or the threat of it—often serves to spur smart self-regulation that wouldn't otherwise occur. You want to see a scalpel at work? Wave around a meat cleaver.
A case in point is how banks are getting more serious about addressing consumer complaints now that the Consumer Financial Protection Bureau has created a database of complaints about banks and other financial institutions.