Earlier quoted context omitted.
The auto companies are strategically significant because war footing America will turn those F150 lines into tank lines in a matter of months instead of the years it would take to spin them up from scratch. IBM made machine guns on typewriter lines in WW2.
Exactly correct. Good time to skim https://en.m.wikipedia.org/wiki/Willow_Run . Years of startup problems but when it finally started humming they were building a B-24 every 63 minutes! In the meantime existing factories were winning the war. As Americans we tend to glorify the industrial feats of WWII but the US government used a very heavy hand to pull that off. Public-private partnership is the preferred euphemism…
Today the US military budget is 3.4% of GDP. Can you imagine it being ten times as much?