It was barely a few hours before his address to the nation on November 8 that Prime Minister Narendra Modi took his cabinet colleagues into confidence about his dramatic decision to demonetise Rs 500 and Rs 1,000 currency notes. All senior cabinet ministers had been told to leave their mobile phones outside: it was in this secured environs that the prime minister shared his ambitious plan to curb black money and corruption with them, one that would be the talking point all over the country for days to come.