...our economy boomed after WWII. The German, and Japanese economies, also, boomed after the war. You can't plausibly claim that it was government fiat in WWII that lead to their booms, because their policies left their countries in a pile of rubble. Yet, you make the exact same claim about the US!
Of course I can make that claim - the Keynesian economics caused a boom in all countries, as it always does.
Germany simply didn't follow a Keynesian path after WWII.
The boom is the US was in part the result of our bombing their factories. We were the last producer left standing.
This isn't true in regards to Germany. Production in Germany actually increased through 1944 (...in large part due to workings of Albert Speer).
1) This isn't true. Civilian production was cancelled. Military production topped out in mid-1994, and declined thereafter.
2) There was a lot more bombings after mid 1944.
1) I didn't know we were differentiating between civilian and military production. Production is production. It doesn't matter who the consumer is in this case. FYI, civilian production was scaled-back, but not cancelled (and not until mid 1942)
2) Germany's relative GDP increased through 1944. The drop-off in 1945 was due to the factories falling under allied control and the war ending in May of that year. Allied bombings had incremental effects on overall production. Many were targeted terror bombings (see Dresden).