Can you name a system, even a theoretical one, which doesn't meet your anti-criteria of being "forced participation and oppression .. morally indefensible". I don't think you can, which renders your criticisms hollow.

Human beings purchasing things from each other with no legal system? With no property rights? Is this system global, and if not then how do you interact with other nations with their own systems. None of this can exist without someone with a big stick to keep people in line.