"A lot of politicians are already worrying," Parrikar said, apparently referring to opposition's criticism of the government's action.
He also said he came to know about the move to do away with the higher denomination notes only at the Cabinet meeting when the Prime Minister's speech was aired.
Parrikar said the next morning he realised he was the richest in the defence ministry as he had Rs 220 (in smaller change) in his pocket. The Rs 7,000 he also had did not matter then.
He said there are "substantial counterfeit notes" which India's enemies are using for terror funding.
"As a Defence Minister I am very happy. In one strike it has all vanished," he said.
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