You’re claiming that if capitalism tends to backslide into X, then X is part of capitalism. My point is that every system can backslide into something more primitive where a strong man makes the rules. They’re not all the same, so your idea that X is an inevitable part of capitalism is wrong. Capitalism is what we call it when it has a certain set of characteristics. If it no longer has those characteristics it’s no longer capitalism.
I’m claiming that capitalism in particular is one of the most corruptible systems
And you’re wrong. There’s nothing about capitalism that makes it more corruptible than feudalism or oligarchy. In fact, those systems are much more corrupt in general.
It tries to harness the power of greed and turn it into positive sum games
Whereas feudalism doesn’t even try to do that. It just skips the positive sum games part and accepts greed. At least with capitalism there’s an attempt to make things better.
I think greed driving society maximizes corruption
Maximizes corruption? You think capitalism is more corrupt than a strong man system where everybody is forced to constantly flatter and pay tribute to the strong man? A system where the rules are whatever the strong man says, so bribery is baked into everything?
think we should replace that with something else
Sure, let’s do it, what do you propose? And how do we get there from here?



It also doesn’t mean that they’re all the same system. So, if capitalism is one of the many systems that can backslide into authoritarianism doesn’t mean that authoritarianism is a part of capitalism, despite your claim to the contrary.
Yes, in the modern world things change much more quickly. Technologies didn’t change for thousands of years. That meant that the number of people a farmer or a plot of land could feed stayed constant for thousands of years. That meant the maximum size of a city was pretty constant. That dictated the kinds of governments that were stable.
It was technology that has made systems unstable, not capitalism.