Unions need some external extra incentive, like the state forcing them to exist or subsidizing the cost of organizing, to exist long term.

Why? Once you pass a level of wealth where basic needs like, food, housing and healthcare are met your happiness probably depends more on how you perceive your position to be compared to people around you. Even your post suggests that, as you're comparing your position to people wealthier than you, even though you likely have your basic needs met. Once you get the US median salary, you'll just switch to comparing yourself against the really wealthy people. It's easier to be happy with what you have in a more equal society.

Also people, especially kids, are not always good at understanding the consequences of their choices. The convenience of playing games at home is easy to see, but few kids understand how that choice will affect their social skills over the long term. Allowing individual preferences to dominate society might not give us the best result.

That was in large part due of strong leftist movements and states that forced the capitalists to share the increasing wealth. WW2 and the resulting labor shortage and other special circumstances contributed as well. Currently no such movements and circumstances exist. Globalization and the resulting free movent of capital has put capitalists in a better position to direct the extra wealth for themselves than ever before. A global movement is required to get a meaningful share of the increased surplus to the workers now, and that is very hard to do. The market will not do it on its own, as the demand for human labor eventually decreases due to automation.

I've seen you say "you don't matter" in many of your comments. Why do you think like this? Sure, we don't matter much most of the time, but this kind of elitist thinking and decision-making is clearly leading to growing discontent, which can then be used against "people who matter". Perhaps the tools for controlling the masses are now powerful enough to make what you say true, but there's a chance your "let them eat cake" attitude will lead to the downfall of the people who currently matter.

But even if Bezos actually creates billions of value on his own, it doesn't mean that he should get those billions. The reward for such high value work should be high enough that Bezos chooses to do it instead of something else, but it doesn't need to be higher than that. In a world where the highest paid position would reward a few million instead of a few billion, I'm sure Bezos and people like him would still gravitate towards that work since it'd still be work with the best rewards.

People who have some revolutionary ideas wouldn't abandon them if the potential highest reward was millions instead of billions. Or do you believe that there are people with good ideas right now that abandon them because they can't earn trillions with the idea? What people expect as a reward for their work is what decides whether they do it or not. If we can lower the expectation, we can get the high value work without creating dangerous levels of power concentration.

Concentration of power stems from our inability to make good decisions as a group of equals. We have to choose someone to make decisions for the group because there is currently no other working way to make them. Current technology might enable us to find some form of true democracy, but I'm not sure if anyone is looking for it.

So if people who need predictions for decision-making start relying on prediction markets with a lot of low value gambler predictions and opinion manipulators (wealthy participants can use the platform to mislead people as well) the value of these things might be negative.

What we produce in this economic system is decided by money. If 90% of all money is in the hands of the wealthy, then 90% of all we make with out limited workforce and resources will be decided by them.