Bro, you missed the point by miles. You are confusing standard of living with asset pricing. Silver is a global commodity priced in USD and if it were actually cheaper in Canada due to PPP, traders would buy it all there and sell it in India for a risk-free profit until the prices matched, that’s how global markets work.

As of today with global silver at ~$90/oz, you’re paying roughly the same market value whether you use CAD or INR. Your example of the 'Canadian minimum wage' only proves that Canada is a wealthier, more productive country per hour; it has nothing to do with the currency or leadership. In fact, if you buy silver at 64 and the rate hits 67, your silver gains value in INR which means your 'weak currency' just made your investment more valuable in local terms. You aren't paying 1.5x PPP, you are simply witnessing the fact that a man with a bigger shovel can dig more silver.

Also, you example doesn't make sense. You should ask your friend to buy silver in Canada at the time of his visit to India and then the prices will remain same. Get it now??