As far as the government is concerned, they would like everyone to die suddenly at age 55, while at work, having paid taxes and preferably being driven dead to hospital by private transport rather than by ambo.
Healthy food. Sadly driftking, your knowledge of healthy food (ie that which grows, is fresh, seasonal and prepared appropriately) while accurate, has been totally overwhelmed by other definitions of healthy. For example no fat or low fat (=high sugar, water, chemical thickeners or fibre - at least 2 substitutes are OK), Heart Tick (=circa $200000 to the heart foundation per item assessed, meaning Maccas can get one, but not a small business), low GI (if it's low GI, high kJ, low nutition it must be OK) and the best of all "I always eat healthy and exercise - why am I 40kg overweight?". Sham and stupidity have overcome common sense.
Truth is there is no truth in healthy nutrition as the public hears it. Micronutrients, in fashion fads (Goji, coconut water among others), complex carbs etc are all marketing tools, not an indication of healthy foods. If the government did introduce a weighted tax scale on foods, you can bet that white bread, white rice, pasta/processed sauces and thousands of unhealthy bullshit items that have no place in the diet of any species, let alone a supposedly intelligent one would all be taxed in the healthy scale.
Australia has fallen foul of allowing our regulators the right to say what is right. There are far too many examples of knee-jerk public/political interventions that make no sense (eg sun is bad - after how many hundreds of thousands of years - oh wait, I forgot the ozone all pissed off?!?) and I would not trust the pollies to get this one right either.
I like your idea driftking, but the reason you are not good at politics is that you have no vested interest in margins, manipulation, profit or control of society. Having said that, I'd vote for you to assess products for health tax over Rosemary Stanton and all the other big-mouthed, paid liers.