However: I don’t really have a choice if I want to survive after having retired.
Yes you do. Cash, gold, bitcoins...
The “working class” is the set of people who have nothing to sell, but their labour to survive.
As with any such definitions, there are gradations. Plus you will not die if you stop working, you will just live very poor.
Tha only tracks if A) work is inherently good, or B) the work he’s doing is actually beneficial (considered that he actually works). I don’t agree with both (or ever all three) points.