Sustainable Australia have been around for a while. Economically and politically they're essentially socialists. In many respects they're no different from the host of other national-socialist parties out there including Katter/Hanson/Palmer ie stop selling domestic assets to foreigners, reduce immigration, address taxation loopholes etc but they have a few lefty policies in the mix as well such as increase arts funding, raise the barriers of entry to land developers, lower housing costs, and a few environmental policies designed to save the planet from ourselves.
Sustainability is about utilising technology and capital goods in an increasingly efficient manner so as to drive down prices and reduce waste. In order to do this business models need to be based upon free-market principles, whether it's water infrastructure, housing or immigration. This means governance must not be hindered by political motives and enhancing value must be recognised as the prime motive for service delivery.
SA's agenda is to use the power of the State to ram home their own values at the expense of others.