Alienated ≠ violated
An inalienable right isn’t one that should not be alienated, but rather can’t be alienated. For labor’s rights, responsibility can’t be alienated at a material level. Consent isn’t sufficient to transfer responsibility to another. For example, a contract to transfer responsibility for a crime is invalid regardless of consent.

Legal rights can be fictions but also can be based on ethics.

Workers consent to employment unlike kings. Inalienability shows it’s invalid