That's provided for some interesting reading.
Incidentally, I had just been chatting with my mother last night about how people managed in Europe at the war's end once their money became worthless. Rural farmers couldn't go into the city to purchase supplies, but city people had to go out to the country and barter their personal belongings for barely enough food to subsist upon. The situation probably lasted for at least several months if not for a year or two before the new currency was established.
Whatever the real reasons, India's demonitization policy is significantly different from the currency collapse of a post war, bombed out and occupied country, but it goes to show that things needn't necessarily be that far fetched before the government can step in and mess around with peoples' savings and plans.