The state intervention is not part of capitalism, that is the exact opposite. You can say it is an inevitable consequence and I would agree to some extent, but what is happening in america is a corrupt system having nothing to do with capitalism. When the federal government controls the currency supply, and takes something like 5 trillion out of the system, that is nothing capitalistic to that.
I agree with most of what you are saying, but I disagree that it is a necessary part. Corruption is inherent in every system that I am aware of, but it doesnt need to be part of it. Right now, we could reduce the federal government to 1/10th of what it is with no problems, and that would be closer to true capitalism. The system currently just recirculates the money to the rich because the governmet is so big and it controls what we do.