There are many cultures that contribute to the growth and vitality of modern commerce (Israel and Japan are notable) but America is the elephant in the room. America has had two extraordinary efflorescences. A baby boom after the Civil War and a larger one after WWII called the Hippy Revolution.
There will always be new work for humans so long as the American spirit survives. The hippies embodied much of the essence of America. They were dirty like Vikings (as opposed to Japanese), believed in ‘tabla rasa’ inborn goodness of people. They were optimistic but had a religion of Armageddon. They wanted to make the world in their image and many of them were doers.
The hippies found that 20 people could live on the earnings of one person and they did. 19 got stoned, hung-out and wandered the world. They, like others, had no reason to work.
Hippies started their own businesses to change the world and over time the few founders hired the rest as employees. The hippies created much of the modern world from the organic food revolution to alternative fuels, to robust bicycles, to new fabrics, health, education, new music, pleasure drugs and even the personal computer. Much more of course.
The hippie efflorescence of core Americanism makes sure that a few people will always create new industries to employ many others.