The government might soon make it mandatory to furnish a permanent account number ( PAN) for cash transactions over a certain limit, Finance Minister Arun Jaitley reiterated on Sunday, in a Facebook post. The bulk of Indians’ black money was within the country, he said. There was aneed to change the national attitude, so that plastic currency becomes the norm and cash an exception. The government was working with various authorities to incentivise this change. The government has already said it is targeting undisclosed money abroad, with stringent action against those who’d chosen not to take advantage of the three- month compliance window in this regard, that ended on September 30. The minister said the monitoring regime of the income tax department had been strengthened and its capacity to access information and apply technology- driven analytical tools to expose evasion had been enhanced. In the 2015- 16 Budget, Jaitley had proposed making PAN details mandatory for all sal