Former Chief Justice of India. J. S. Verma on Saturday slammed Prime Minister Manmohan Singh for his inefficient role in controlling corruption scams in the government. While criticizing Singh's leadership on the second day of two-day seminar organized by an NGO in New Delhi today, he said the person at the helm of affairs must ensure that there is no corruption in country. Verma added the Prime Minister's honesty - that he is often credited with - is rather the basic requirement of a PM, than being an asset.