Kumar, who has been stressing the need for a launching a crackdown on benami properties and prohibition along with demonetisation, said it is "not possible to transform the country into a cashless economy".
"My stand has been very clear. Only demonetisation cannot root out black money. It should be coupled with a simultaneous attack on benami properties... Land, real estate, gold and diamond and liquor ban to yield results," he told reporters.
Prime Minister Narendra Modi while announcing the decision to demonetise Rs 500 and Rs 1000 notes on November 8 had said it will lead to some inconvenience for the initial 50-day period.
"I had supported demonetisation on November 9... But on November 16, I had highlighted the poor implementation of the move," he said.
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Asked about Mamata Banerjee denouncing Rahul Gandhi for meeting the PM when Opposition is attacking him over demonetisation, Kumar said, "It's between the two parties. I cannot say anything about it.
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