“Except where market discipline is undermined by moral hazard, owing, for example, to federal guarantees of private debt, private regulation generally is far better at constraining excessive risk-taking than is government regulation.”
That was Alan Greenspan back in 2003. This is little different from another of his famous maxims, that anti-fraud regulation was unnecessary because the market would not tolerate fraudsters. It is also a key premise of the blame-the-government crowd (Wallison, Pinto, and most of the current Republican Party), which claims that the financial crisis was caused by excessive government intervention in financial markets.
Market discipline clearly failed in the lead-up to the financial crisis. ... However, one thrust of post-crisis regulation has been to attempt to strengthen market discipline. This is consistent with the overall Geithner-Summers doctrine that markets generally work close to perfectly, and that regulation should mainly attempt to nudge markets in the right direction.
Ultimately, one of Min’s suggestions is that we simply cannot rely heavily on market discipline as a means of constraining risk-taking by financial institutions. This leaves us with relatively unfashionable tools like higher capital requirements and structural reforms (size and complexity limits). But that’s not nearly sophisticated enough for the Geithner-Summers-Bernanke crew.