Vinod Rai in a report in the Times of India accused former prime minister Manmohan Singh of "running from his responsibilities" during his tenure as PM.
"The prime minister is the first among equals.He has to take the last call which sometimes he did, sometimes he didn't. Everything cannot be sacrificed only to remain in power. Governance cannot be sacrificed at the altar of compulsion of coalition politics," he said.
The newspaper also quoted Rai as saying, "Politicians came to my home and told me not to name some people and to protect some others in connection with the CWG and coal allocation reports."
Rai however, did not name the senior members of the UPA government who he claimed had met him.
Rai, who demitted office last year after several run-ins with the UPA government had estimated a "notional" loss of Rs. 1.76 lakh crore in the 2G spectrum allocation and Rs.1.86 lakh crore in Coal Block allocations.
Meanwhile the Congress hit back at Rai saying it was a publicity stunt by the former CAG at the end of his tenure.
Congress spokesperson Manish Tewari tweeted, "Reiterate standing invite to former C&AG Rai Sahib to debate at any forum of his choice, sensationalism that formed the staple of his tenure?"
Rai is penning his views in his forthcoming book "Not Just An Accountant" to be released in October. This would be the latest in a series of embarassments to the former Manmohan government. Recent books by the former PM's media advisor Sanjaya Baru, former external affairs minister K Natwar Singh and former coal secretary PC Parakh have all been severe on Singh and his government.
(With inputs from PTI)