At least 60 to 70 percent of the population should have a bank account before taking such structural reform. second, I am not sure how confident Pakistanis are with online transaction and how good digital infrastructure is there. India, though not comparable to best, has pretty decent digital infrastructure and people have built trust in online transaction thanks to booming e commerce and e wallet players like Paytm.
I think once the two pre requisites are in place Pakistan can think of such reform but as I said before Pakistani leadership has to think out of the box now as this strategy won't work anymore.