Move to Canada where labeling is required.
Wine- In North America, if it is labeled Shiraz by a proper vinyard, it is Shiraz, and from the region specified. Leave the generic plonk to winos and university students.

With regard to Australia, see Australian Government LIP requirements, which are quite strict:
Wine labeling

Australian winemakers making label claims of vintage, variety and geographical indication must provide an audit trail. The LIP prescribes what events must be recorded. A penalty is provided for vintners who fail to keep records.
Of course, the LIP doesn't cover generic plonk.