I'd expect someone would do research before coming to a strong conclusion that you are willing to "stand by" for no reason other than what you feel. Nothing to do with being a football forum. You are basically saying you believe whatever you want because of subjective feelings and don't care what the facts are.
Every individual case is going to be unique so anecdotes don't mean much. First my original reasoning still stands. Poor people can't afford to make a single mistake. Rich people can afford to make many mistakes. That's an inherent advantage to the heavily market based systems.
We can also look at some trends in data and social mobility. The data shows the higher the income inequality the lower the social mobility.
This isn't even factoring in wealth inequality:
The conclusion from the data would be there are strong structural factors that inhibit greater social mobility. We can certainly get deeper into incentives and incentive structures as well. How when the elites control policy, incentive structures are created that do not benefit the poorest (or even the bottom 80%).
Then there is this:
"It all starts with the psychology concept known as the “fundamental attribution error”. This is a natural tendency to see the behavior of others as being determined by their character – while excusing our own behavior based on circumstances."
https://www.theguardian.com/us-news/2017/jul/05/us-inequality-poor-people-bad-choices-wealthy-bias