Break up the Big Four? cfo.com reports some critics want to break up the Big Four accounting firms into as many as eight different companies.

One such critic is Richard Breeden, former SEC commissioner and court-appointed monitor for MCI. "The next head of antitrust at the [Department of Justice] should just sit down with [European Union competition commissioner] Mario Monti and agree to break the Big Four firms up," he says. "The concentration is too big to be healthy."