> However, the moment this was announced, people have been brazenly finding loop-holes to convert their currency notes through unofficial means. Example : back-dated receipts for expensive items (gold, cars, property), fake accounts, hiring poor folks for conversion via official channels, bulk purchase of coupons / cards for essential items that are permitted to accept older notes, etc..

Plugging loopholes is the only enduringly useful thing that would come out of this exercise. Although, yes, the ones you mentioned have been marginally successful, the administration is doing a decent job at addressing them. For eg, people exchanging cash need to have their nails marked with indelible ink to foil crowdsourced attempts at laundering money, people with abnormally high deposits, with respect to their I-T returns, will need to explain their source.

I remain ambivalent about the approach, or its immediate benefits. However, what will prove effective isn't necessarily an excellent tax collection for the year, but making a big leap towards a transparent economy. That, however, remains to be seen if it's only a pipe dream.