Furious Indian investors are demanding to know how PricewaterhouseCoopers (PwC), one of the world’s largest accountancy firms, missed a systematic £1 billion fraud at Satyam, the IT outsourcing giant, for as long as seven years. In contrast, Merrill Lynch, the US bank, became aware of the deception in just ten days. PwC’s role in “India’s Enron”...