The Congress on Tuesday slammed the government over the 2016 demonetisation move and alleged that it was an "utterly wasteful, unproductive exercise" to feed the "megalomaniacal ego of one man", reported news agency PTI.

The opposition party's attack came a day after the Reserve Bank of India (RBI) on Monday said that nearly 97.38 per cent of the Rs 2,000 notes have been returned to the banking system, and only about Rs 9,330 crore worth of the notes are still with the public, reported PTI.