To say it's as simple as "just work harder" takes away from the argument. I know people who have spent their entire working careers working much harder than more financially successful people. How do you account for that in this magic all encompassing plan to just "work harder"? The point of the thread is to prove to you people that that is simply not how it works. If all the toilet cleaners simply "worked harder", who would clean the toilets? In our economic system, someone will always have to do the dirty low wage jobs, regardless of how hard they work.
I would say being a janitor or plumber is just as hard as anything else
The most successful people, however you want to measure, often aren't the objective best. They're not the smartest, the best decision makers, or the hardest workers. In reality, a lot of the most successful people are really just the best self-promoters and credit takers. They make the right friends, they're the best bullshitters, and they overstate their role in things that other people were actually responsible for. They get ahead despite the fact that they don't objectively deserve to be there.