Isn't there a concern that those who were using these high denomination notes just switching to other currencies? Bhutan has a currency that is pegged 1:1 with the Indian Rupee and will (presumably) still issue Rs 500 and Rs 1000 notes. Sri Lanka is another possible candidate; and of course there are the standard global reserve currencies - the US dollar and the Euro - whose notes worth over Rs 1000 are relatively common place.
How on earth do you derive purchasing power from comparison of arbitrary units? ~Rs 1 does not have the purchasing power of 1 USD,. 1 Zimbabwean dollar does not have the purcahsing power of 1 GBP.
Things in the UK are a little more complicated with their multiple central banks, but the £100 note is still being printed and while uncommon, it is in circulation throughout the UK.
They almost certainly wouldn't be accepted anywhere except banks (many shops are suspicious of even low value non-standard notes), so I don't know if you can really call that "in circulation throughout the UK".
http://www.worldbanknotescoins.com/2012/02/the-royal-bank-of...
I still remember the first time I got paid with cash, and received a couple of £100 notes. Most money I'd physically held in my hands up until then.
The PPP is, in simple terms, the amount of money in each currency that can buy similar amounts of goods; so taking this PPP at face value, what 1 dollar can buy in the US, 17 rupees can buy in India. This is of course not entirely true, because it's an averaged value, and there's other complications, but it's at least a better starting point than assuming Rs 66 per dollar.
[1] https://stats.oecd.org/Index.aspx?DataSetCode=SNA_TABLE4
According to the Global Findex by the World Bank [1] 47% of the Indian population doesn't have a bank account. And only 22% of the population have debit cards.
I don't know, this seems too extreme to me. Certainly 500 euro notes or 100 dollar bills are very useful in dark markets, but the Rs 1000 note was just worth $15USD. This may end up being just a temporary recall and they will reissue 500/1000 notes in a couple of years.
[1] http://datatopics.worldbank.org/financialinclusion/country/i...
So, I think he agrees with you and is just pointing out without the 500 or 1000 note's the 100 is only worth $1.5USD.
Basically, they are no longer bills but checks with expiration dates.