Sometimes it does. Other times, it's barely enough to achieve survival.
> Most prosperous people achieved prosperity due to earlier hard work and sacrifice of themselves (or their immediate ancestors.)
Or their distant ancestors. Or due to their -- or their ancestors' -- criminal activities or exploitative behavior or sheer luck.
Every single office job I've had, except my first (which was a data entry job, not programming), has been a lot more stressful a lot more often, and I'm including the job where the first thing my coworkers and I did each morning was play a video game to determine who was going to go pick up coffee (Carcassonne on Xbox Live Arcade, if you're curious, took about 20 minutes).
And this is true whether your folks won the lottery or earned their money through hard work.
https://www.cnbc.com/2019/05/29/study-to-succeed-in-america-...
This part wasn't in your link, I don't believe this is true.
Any guesses on when the people working hard at a fast food restaurant will have prosperity arrive?
Hard work leads to prosperity. That's not the same as equating prosperity to hard work.
Most prosperous people achieved prosperity due to earlier hard work and sacrifice of themselves (or their immediate ancestors.)
Clearly, the 'value chain', as you put it, exists as evidenced by the numerous posts on this thread of describing the previous fast-food-type jobs they held that led them to more 'prosperous' positions (at least, affording enough prosperity to spend time posting messages to the internet instead of digging ditches or flipping burgers.)