The equally uncoerced status of all individuals taken into consideration.
[bk]
If, however, I am to have as muchliberty as others, and if others are to have as much as I, then, feeling secure in what we have, it will behoove us all undoubtedly to try to attain the maximum of liberty compatible with this condition of equality. Which brings us back to the familiar law of equal liberty; the greatest amount of individual liberty compatible with the equality of liberty. But this maximum of liberty is a very different thing from that which is to be attained, according to the hypothesis, only by violating equality of liberty. For, certainly, to coerce the peaceful non-co-operator is to violate equality of liberty. If my neighbor believes in co-operation and I do not, and if he has liberty to choose to co-operate while I have no liberty to choose not to co-operate, then there is no equality of liberty between us.
Benjamin Tucker
"Liberty and Organization"
[tucker]
If
So if we let A designate an American Employer, and B designate an "undocumented worker", then we would have to say that A and B do not enjoy equal liberty because of the coercive threat of C, the government immigration agent.
Even if the contract between A and B is voluntary (uncoerced), we might still say that B is the victim of exploitation. This exploitation is more the contribution of agent C than it is of employer A.
[bk]