The author obviously wants you to believe that it was the abandonment of the gold standard, but there are several other theories that have more credence with mainstream economists. The early 70's was the start of a horrible period of stagflation: stagnation coupled with inflation. Some do blame the loss of the gold standard, but the leading theory is the OPEC oil crisis. Others blame market regulations, the EPA was p…
At around the same time, the growth of GDP and standard of living dramatically slowed down in the Soviet Union, too. From venerable ~5% per year in 50s and 60s, to ~2% in 70s, to ~1.25% in 80s.
Different legal, political, financial and managerial framework, the same decline.