The industrial base of Japan and most of continental Europe was destroyed in strategic bombing campaigns or captured by the Soviets after WWII.<p>Nazi scientists: <a href="http://en.wikipedia.org/wiki/Operation_paperclip" rel="nofollow">http://en.wikipedia.org/wiki/Operation_paperclip</a><p>Global superpower is the USSR<p>Income tax: <a href="http://en.wikipedia.org/wiki/File:MarginalIncomeTax.svg" rel="nofollow">http://en.wikipedia.org/wiki/File:MarginalIncomeTax.svg</a>