Is the metric for most stem masters or phds useful? The Soviet Union use to produce many such people but never achieved much.
I disagree. Some of the Soviet scientists who won a Nobel Prize in science [1]: - 1958 Pavel Cherenkov, Ilya Frank and Igor Tamm "for the discovery and interpretation of the Cherenkov effect" - 1962 Lev Landau "for his theories about condensed matter, particularly about liquid helium superfluidity" - 1964 Nikolay Basov and Aleksandr Prokhorov "for fundamental work in the area of the quantum electronics, which led to…
You can have lots of people with post-grad credentials whose creativity is not fully utilized. Or who don't really have the requisite creativity in spite of their credentials. The USSR may have had quality and quantity in spades (maybe it really did!) but their economic structure wasted that advantage.