Asserting that the government has launched a “crusade” against corruption and black money by demonetisation, Prime Minister Narendra Modi today sought opposition’s cooperation while his rivals called the decision ill-prepared and hasty, causing “economic chaos”. Leader of the Opposition in the Rajya Sabha Ghulam Nabi Azad alleged the decision to invalidate Rs 1000/500 currency notes was leaked in advance to some people, including BJP leaders, and called it probably the “biggest scam”.