That could be about to change after it was revealed last week that PricewaterhouseCoopers (PwC), the world's biggest accountancy firm, faces a $2bn (£1.2bn) lawsuit linked to Bernard Madoff's record $65bn investment fraud. PwC was not Madoff's auditor. That job famously went to a three-person outfit without the ability or inclination to ask the necessary questions of its powerful client. The case against PwC's Canadian arm, brought by investors who lost their savings via the Madoff "feeder fund" Fairfield Sentry, is that the firm was negligent in failing to spot that Fairfield Sentry's $7.2bn of assets invested with Madoff did not exist. - Mükremin Sarier