There's a lot of scammers in the world, but OpenAI, Tesla, Amazon, and Microsoft have mostly made my life better. It's not about having money, look at all the startups that have raised billions and gone kaput. Vs say Amazon who raised just $9M before their $54M IPO and is still around today bringing tons of stuff to my door.
I can't comment on the other things.
These are valuable skills, though perhaps nowhere near as valuable as they end up being in a free market.
If a CEO delivers a certain advantage (a profit multiplier) it's rational that a bidding war will ensue for that CEO until they are paid the entire apparent advantage of their pretense for the company. A similar effect happens for salespeople.
The key difference between free and real markets in this case is information and distortions of lobbying. That plus legal restrictions on the company. The CEO is incentivized to find ways around these issues to maximize their own pay.