No, it is not...
Yeah, the Soviets need more factories to survive. But, like you said, going to full wartime laws with the US more than makes up for twiddling your thumbs for 5 years.
Looks good - a single-minded focus on increasing your IC. When the time comes, are you going to show us all the toys you can build simultaneously with this industrial base, or is the point of this exercise merely to show how to balloon your IC?
True, but then, who plays the USA on anything but speed 5 after the first week or so of 1936? I zoom through until September/October '41. I pause a lot to shift things around and get my fleet somewhat positioned and organized how I want, and any garrisons for the Pacific put into place.
Hitting 600+ IC is always a hoot.