Earlier quoted context omitted.
There's a fundamental flaw in your reasoning too. You can't have capitalism without some form of government and you can't have government without some form of taxation.
you can have voluntary, free trade without government. whether it's called "capitalism" or something else can be a matter of discussion...
If all free trade actions could be resolved by rational, respectful, interaction of two individuals of integrity (ie they keep their word), then no government is needed. As far as I can tell, if such a world existed, we wouldn't be having this discussion.
As long as individuals need to collaborate in order to resolve disagreements, as long as certain individuals need to take responsibilities for overseeing these collaborations, government is necessary.