"Australian beer, for example, is regularly seven- or eight-percent alcohol" - source?
The majority of Australian commercial "full strength" beer is around 4.9%. Coopers push the boundary a bit with their Best Extra Stout (6.3%), Special Old Stout (6.8%) and Extra Strong Vintage Ale (7.5%). Beyond that is the realm of specialty beers e.g. Grand Ridge Brewery Moonshine (8.5%) and Supershine (11%), Wig & Pen Russian Imperial Stout (11%).