War can create innovation. Is it the "right" innovation" No. But it can help economies. I agree not the best way. But it got us out of the depression. There was no return to the depression because the GI Bill was created. Thus returning soldiers didn't over-flood the economy with surplus labor and instead went to college.
Second, how does less workers making a product (and thus workers laid off) mean more jobs for everyone? It means less jobs.
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