They are taking a percentage point or two on the entire consumer payment system.

I think there's plenty of money to back all the activity.

Especially if there are central banks willing to back them

> They are taking a percentage point or two on the entire consumer payment system.

Visa/MC make about 0.1-0.13% of each transaction, not a 1-2%. The rest of the interchange (the vast majority) goes to the issuing bank.