But stopping H1-B visas, offshoring, and hiring of non-American born engineers all at the same time because war breaks out will accomplish something. Suddenly the American born male engineer becomes very important again. They will invent many new things because of the huge war time investments made in technology, and after the war America will ride another big technological wave for the next 20 years.
fight a War every 20 years? with whom? The jobs may move from the country you are at War with to another country in the vicinity we are not at war with.
My own belief is that the Marines did OK with the run of draftees during this period and the Army did not for political reasons. Effective training for such human material is rather strict and has a pretty fair death rate. The Marines used the brig, a remarkable experience in those days. You would not believe the details.