"The gap has never stopped growing since 1971. Some would say that the system that was established de facto in 1971 and then legalized by Jamaica Accords in January 1976 is a failed experiment that we must try to get out of as soon as possible."

There were a lot of parts to that "failed experiment" that had nothing to do with a fiat currency. In fact, the results of trying to preserve the gold standard (which was mostly defunct except for international trade) would have cost the US its position in the world's economic standing.

Most of the problems confronting the working class were more closely aligned with the political abandonment of workers by any factions on the "left" as it sought out new donors not affiliated with unions. The "third way" Democrats have championed deregulation and privatization of public services far more effectively than Republicans could have. Restoring common sense regulations and proper use of the tax code is much easier to accomplish and more effective than would be risking global recession/depression by totally upsetting the world's economic systems.