I think Rand was strongly shaped by the communist regime in the Soviet Union. Her father was a pharmacist with his own practice and they were rather comfortable economically speaking. That ended when the Bolsheviks took over and nationalizing his pharmacy and leaving the family destitute and nearly starving just a few short years later.
@Xocomil’s post reminds me how similar China and the old Soviet Union was in many ways. The Soviets figured out they couldn’t do away with their black market because their economy would crash without it.
It’s always been a concern in authoritarian regimes (or any) that money is power. Even if the person cannot speak publicly, they can still spread some wealth around to ensure they are heard privately, undercutting the leadership. It’s an obvious motivation for the leadership to ensure that people outside the regime don’t accumulate too much wealth or toe the line - as Putin and Xi have both enforced, in their own ways.
Deng Xiaoping’s “socialism with Chinese characteristics” (circa 1980) was the critical building block that 45 years later resulted in the billionaire class. The companies you cited are either manufacturing or chinese market specific (Alibaba) that has a lot of barriers to entry. The Chinese communist party may indirectly “own” a lot of US agriculture and other companies. However, it’s not an micro managed orchestrated plan.
The old Deng Xiaoping compact was “you are allowed to get rich, but never ever question the right of the party to rule.” As someone else pointed out, Jack Ma is a very good example of accruing too much power outside the party, and paid the price. [Not trying to derail or bring politics into this thread. But there are an awful lot of parallels between Trump 2.0 and “you can get rich, but you have to publicly toe my line.” IMHO, one of the silicon valley oligarchs is going to be made an example of.
Once authoritarians get into power they tend to shift more and more to maintaining and extending that power. Which IMHO is a major reason why far-right and far-left regimes tend to look more and more similar over time; the right and left aspects fade away in favor of purified authoritarianism.
It’s something that Communism and Capitalism have in common; when in power they make the other extreme look more attractive. I hear lots of people speaking fondly of Communism and bashing “late stage capitalism” these days.