I wasn't familiar with the Australian "Milk Wars", and went down a bit of a rabbit hole. This $1/liter pricing appears to have started on Australia Day in 2011,

I wasn't familiar with the Australian "Milk Wars", and went down a bit of a rabbit hole. This $1/liter pricing appears to have started on Australia Day in 2011, and continued until 2019. But in this summary [1] of the report that Australia's competition regulator released in 2018 we can see that the price/liter that farmers were getting during this period doesn't seem to have been affected by the $1/liter pricing. The ACCC found (quoting [1]): "no direct relationship between retail private label milk prices and farmgate prices", and that neither the rate at which farms closed down, or their profitability was affected by the $1/liter milk. 1. https://www.farminstitute.org.au/briefing-dairy-regulation-and-floor-pricing/ https://www.farminstitute.org.au/briefing-dairy-regulation-a... 2. https://www.accc.gov.au/about-us/publications/dairy-inquiry-final-report https://www.accc.gov.au/about-us/publications/dairy-inquiry-...