If you cant quantify the economic impacts of having no upstream supply chain capabilities in Australia yourself, then this conversation will be pretty moot.
Once again you've attempted to apply emotive hyperbole rather than objective constructive analysis. Has the US, Germany, Japan and Korea (etc) only achieved a net exporter status based on poor workers conditions? The answer is no. You're arguments are far to binary, you're relying on ideologies and emotive language to attempt to build a case for unions destruction of the manufacturing and processing industries within Australia.