Australia's peak science organisation CSIRO lifts the lid on Australian eating habits:
You only have to walk around and look at people to answer that question. Look at archival footage of Australia within our lifetimes, 50-60 years, to get another answer. Look at school classroom photos of the past -- I have mine -- and look at kids now, and the answer is clear. The triumph of junk food, the decline of traditional family structures and working patterns, and the modern value system that says only your career, wealth and toys are important, not your diet or health, also apply. Finally, there's the modern view that every health problem can be solved by a pill from the doctor, peddled by pharma companies.