Which corporate currencies are you thinking of? The only big example I know of is Air Miles. That seems pretty well run for a currency. Central banks don't ha

Which corporate currencies are you thinking of? The only big example I know of is Air Miles. That seems pretty well run for a currency. Central banks don't have inflation under control, they've just pushed it to places where it's not measured as part of the definition of inflation - primarily house prices, bonds and equities. That's what you'd expect given the way printed money is inserted into the economy.