the two things--greater domestic wealth for the working class, and a strong foreign policy--historically have been demonstrably causally correlated. Again, as I have alluded to in my previous post, the postwar American economy was extremely prosperous
Someone might counterargue that building bombs that do nothing but explode (or worse, destroy assets) is not a benefit to the economy, and that the 90s had an economic boom as the world returned to peace, and anyway government spending doesn't matter (economically) if it's on bombs or on anything else.
It would be interesting if you looked up how much benefit was from war spending and how much was from other effects. I think you will find there is not actually a correlation.