I find it odd, how Britain, France, America, and The Soviet Union/Russia won WWII, but have failed economically (Especially in the Past 30 years), while Japan and Germany are manufacturing Giants.
I understand atleast in Germany, part of this Economic boom was because of the Rebuilding, and a distrust of Adults in the '50s and '60s. They also had been raised by those elders to be good workers, and were under the heal of the Allies culturally (I mean British and American Music still dominate the German Radio).
The Japanese have always had a sense of Nationalism and Hardworking, and couple along with no erasure of WWII Acts helped create a Hardworking generation of Japanese Laborers.
Your Challenge, should you accept it, is to prevent The Germans and Japanese from becoming Economic powerhouses. Bonus points will be given to those who give those Economic Powers to a different Nation.