That is very true and relevant to so many countries around the world, a lot of what you say after that though seems to be specific to your own country. Some governments take a very active interest in their population's general health.
In Australia a lot of US produced foods are classed as unfit for human consumption and in some cases are considered toxic due to chemical additives. You can buy a lot of US brands in Australia but they're manufactured in Australia according to our public health policies. So you can get Mountain Dew in Australia but it comes in a neon yellow bottle and if you pour it in to a glass you'll notice it's completely clear like Sprite because those chemical food colourings are illegal here.
If you go to a fast food place like McDonalds here you'll notice a drastic difference in the size of drinks and fries, what in the US is considered small is the large size here and there's no "free refills" of soft drinks, by law. We had a huge crackdown on that industry back in the 80s and set minimum guidelines for the standards of food they're allowed to offer and by law they have to offer more balanced and nutritional meals.
More recently we've put easy to understand health star ratings on all of our products. At first this rating on the packages was voluntary but not enough companies picked up on it so we've now made it compulsory for all products including imported foods.
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Having lots of nice parks with outdoor gym equipment encourages people to get out and exercise more too.
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But I think by far the biggest impact on public health is going to come from our social media ban for under 16s. I believe this will encourage kids to get outside and play like kids a lot more. It's the habits we form when we're young that are the hardest to break and not being able to sit inside and doom scroll through social media posts all day should give them a chance to form healthier habits.
So why does our government show such an interest in public health? Because our government pays for our health so it's in their best interests to try and keep us healthier. Universal free health, it's for everyone regardless of wealth or income, if you're a citizen you're covered from birth until death. A simple example of how this works is our sunscreen, here it's government subsidised because subsidising sunscreen is a lot cheaper than trying to cure cancer.
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All of that said, we do still have an obesity problem in Australia although not as bad as the US.