That's like saying living perpetuates murdering. Just because conditions are available doesn't mean it's perpetuated. May as well cars perpetuate drinking and driving, etc.
These are equivocations. Drinking and driving, and murder, have little (if any) justification from a pre-existing set of values. Protecting one's property via coercive means appears to be justified, however, by the very values of a free market system.
All do not inevitably end at organized crime. Of course some will end there, just as there will always be some murderers, some rapists, etc. There is a big difference between "it will end there" and "a few will end there". To say that free market economics encourages coercion is trying to flip the entire edifice on it's head with a questionable use of the word "encourage".
The very right of property entails that individuals may take measures to protect their own. Protection can take many forms, including preemptive measures against competitors. Judging from your perspective, these preemptive measures violate the well-being of other individuals; but they are also justified by the right to protect one's property.
If there are people in existence, all sorts of unethical behavior is "encouraged" that would not be so in their absence. This isn't an argument against anything. The flaws in humanity must be accepted and accounted for.
Any form of statism accepts and accounts for these flaws by instituting arbitrary ones them and forcing them at large upon the respective populations. Unless you want to consider the demand to own the fruit of one's labor as a flaw, your argument in this direction doesn't seem to be going anywhere at all. Conversely, if it is a flaw to require the fruits of one's labor (ethical or unethical in itself), then humanity would surely die quickly, as one could not ethically even consume a morsel of food.
I don't think there is any metaphysical or ethical axiom that grounds the right of individuals to the fruits of their labor. The only thing that qualifies this stance is that all individuals seem to want to keep the fruits of their labor; but this is little better than some kind of Kantian transcendental subjectivism.
The better position is that there is
no inherent right to one's property; certainly we all want to keep and maintain our property, but this doesn't mean there's some deity, or substrate to the universe that ensures this right. It's simply the way human subjects operate. Individuals pursuing the maintenance and success of their own properties and enterprises cannot coexist without coming into open conflict. Protectionism is the norm because individuals want to protect what is "theirs."
I'm going to use a brief quote from Alain Badiou to illuminate what I think is the crux of the issue:
In itself, the economy is neither good nor bad; it is the place of no value (other than commercial value, and of money as general form of equivalence). It simply 'runs' more or less well. Routine politics is the subjective or valorizing moment of this neutral exteriority.
By "neutral", Badiou means that the economy is value-less; it is
nihilistic. Politics is the material manifestation of projected values, in the form of institutions, that attempt to impose and enforce said values.
You're looking for a middle-ground: an economics, a "free" market, absent any political institutions but with a common and universal code of values nonetheless. You don't want a nihilistic market (which is, actually, what the market as pure human transaction and interaction is), but neither do you want a political market. The problem is as soon as you conceive of a market system that proports a universal set of values, you're already in politics. The only way to avoid this is to suggest that the market is value-less. And, in this way, it becomes apparent that "free market ethics" is not a universally applicable form, but merely one set of values among infinite others. It doesn't allow for multiple ethics and values, because it is merely one set of ethics and values.
It might sound as though I'm suggesting that there is no such thing as truth or ethics, but that's not the case. I'm suggesting that ethics is value-less; it is nihilistic. That is to say, it is momentary, situational; or, not universal. There is no set of ethics that subsumes all others.