Lucknow, June 3 - The BJP national executive on Friday accused Prime Minister Manmohan Singh of presiding over the "most corrupt government" since independence, saying it has lost all moral authority to rule. The issue of corruption in Congress-led UPA dominated the first day of the BJP meet here with the party training its guns on Singh and UPA chairperson Sonia Gandhi for looking the other way and keeping mum while the 2G spectrum, Commonwealth Games and Adarsh scams were taking place. BJP passed a strongly-worded resolution on corruption in which is patted its back for the arrest of former Telecom Minister A Raja and DMK MP Kanimozhi in the 2G spectrum allocation scam.