Raghuram Rajan, former Governor of the Reserve Bank of India, had this to say a couple years ago about the idea: “Unfortunately, my sense is the clever find ways around it. They find ways to divide up their hoard in to many smaller pieces… I would focus more on tracking data and better tax administration to get at where money is not being declared. I think it is very hard in this modern economy to hide your money that easily.” http://www.huffingtonpost.in/2016/11/09/heres-what-raghuram-...
The fact that our Prime Minister’s fans are so enthusiastic and the move is aimed at curbing ‘black money’ makes it hard to clearly take a stand against this move, but I personally find it ill thought-out. The fact that some wealthy people are evading taxes by sticking cash in a cupboard somewhere doesn’t mean that hundreds of millions of ordinary people should suddenly be unable to buy milk or bread, damn.