Pratyush Sinha retired as India’s central vigilance commissioner on Monday. During his tenure Sinha, a 1969 Bihar cadre IAS officer, conducted several high-profile investigations such as the ones into the allocation of 2G mobile phone spectrum and preparations for the Commonwealth Games (CWG), among others. In an interview conducted in mid-August, Sinha spoke about issues ranging from the whistle-blower’s Act to the collapse of governance. Edited excerpts on LiveMint,