Ruml 1946

Note the US was back on gold internationally after Bretton Woods:

The Bretton Woods Conference took place in July 1944, but did not become operative until 1959, when all the European currencies became convertible. Under this system, the IMF and the IBRD were established. The IMF was developed as a permanent international body. The summary of agreements states, “The nations should consult and agree on international monetary changes which affect each other. They should outlaw practices which are agreed to be harmful to world prosperity, and they should assist each other to overcome short-term exchange difficulties.” Wikipedia

So Ruml’s analysis didn’t apply until after 1971 when the US finally dropped convertibility.

Might be why Ruml’s points didn’t gain any traction back then.