If one buys sliced bacon how can it be 21% Australian?
Surely a slice of bacon is either Australian or it is not?
Spin, lies, misleading, fraud (whatever) but they still get away with it.
The 'made in Australia' symbol is little more than swindle in a lot of cases.
Most bacon sold in Australia is not of Australian origin, probably only about a quarter of it is, and to some extent this is a backhanded compliment to our pig farmers/breeders in Australia. Australia raises a lot of 'lean' pigs, bacon requires much fattier animals, which is to an extent where the small pens come in, no room to move/exercise, nearly all food intake stored and almost no fat burned, bingo, an animal for bacon.
The rest of the story comes from the rise in popularity of pork belly and pork loin for roasting etc. Traditionally these cuts were made into bacon in Australia, loin being the meaty end (short cut) of bacon, belly being the streaky end, both combined being the standard full rasher. Since it is prohibited to import fresh meat product into Australia, these cuts for domestic consumption must be Australian sourced. This leaves somewhat of a hole in the market for the 'cured/smoked/etc' products which is why we fill much of it from overseas.
Years ago, piggeries used to ultrasound their pigs probably about the mid point of their lives and get a measure of fat thickness over muscle, based on these numbers pigs were divided into 'porkers' and 'baconers', they'd then be 'finished' in terms of diet by these categories.
These days, I suspect that most piggeries don't even bother with the measurements and just raise all lean animals for the fresh market.