[userulluipeste]

"the USSR currency was not pegged to PMs or baskets of securities"

There were a lot of products with their cost in rubles imprinted directly on them, which I guess was supposed to make that currency value "backed by goods" at one point. (It was fun though, after USSR collapse, to get my hands on a cast iron frying pan with its engraved price of a few rubles, and hear that its actual price jumped orders of magnitude at the end of old ruble's circulation, presumably a consequence of "just print".)