Just a few decades before go shopping was publicized as the appropriate response to an attack, the U.S. had a better class of propaganda. Use it up; wear it out; make it do. When you ride alone, you ride with Hitler. Waste helps the enemy.
Frugality and avoiding waste was right then, and it's right now. Pay no heed to those un-American radicals (with their weird clothes) scoffing at traditional American values.