Real wealth is resources. Money is just a measuring stick of relative value that assists in the exchange of goods. Money isn't in and of itself, wealth, if it can't be used to purchase what you need.
Discussion
That's my point.
Because neither Brics internal nor any other economy (not even local ones) can run on exchanging 'resources only'. All is based on products, goods and services.
Not only for the last 300 years. That is what why 'we' invented money in the first place no?
I can't give you recources; but look: here a great equivalent ...
But maybe I am just lost in translation here (can't even get that fiat scheme clear in my native language)