As I have pointed out- World War 2 were FDR's policies on steroids- the very massive government spending and government employment programs that Conservatives claim didn't work did in fact work in World War 2.
By the end of World War 2 the middle class was wealthier than it had been in any time in American history- and the GI Bill primed the pump for those returning GI to be able to go to school, buy homes and start business's.
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Yes, this has been pointed out numerous times to the FDR haters, but they aren't even aware of their cognitive dissonance in essentially admitting FDR wasn't spending nearly enough before the war spending kicked in, and not what they think they're saying. lol
They are also saying all kinds of rationing, limiting corporate profits to 5% or less, and other wartime measures worked, everything
but laissez faire and 'free markets', but they just come up with ever more bizarre handwaves for all for that as well.
The ' middle class' before WW II was small for most of American history, really, and didn't become large until after the war, again as a result of unions, higher wages, and an expansion of the education systems, and a large demographic with disposable income came along.