The Janata Party President, Dr Subramanian Swamy, who was a petitioner in the 2G case before the Supreme Court, on Thursday heightened his pitch for the resignation of the Home Minister, Mr P. Chidambaram, and the Telecom Minister, Mr Kapil Sibal. He termed the 2G scam a “collective failure” of the UPA Government including the Prime Minister, Dr Manmohan Singh, and said Mr Sibal and Mr Chidambaram should step down on ‘moral grounds’.