The US economy grew like a weed on steroids in the 1950s and 1960s DESPITE those things.
Remember: everybody else’s industrial base had been bombed to scrap and/or they were in debt up to their neck.
And - more importantly - you guys still had a free country which was the envy of the world, and a population which didn’t look for handouts.
Now, not so much.
Puhleeze. The world had recovered from WW2 by the mid-1950s. And most developed nations were buying their OWN stuff, not ours. They were protectionist, too.