Re the healthcare issue, it's already been recognised by governments but the issues are far deeper than just politics. The NHS has been focused on these long term interventions for a while now, but on top of long waiting lists, staff and resource shortages (which have been massively exacerbated by Covid) there's also the fact that these interventions require patients to take the responsibility for their own health. There isn't any easy solution to that, education is crucial, and funding for grass roots sports, having more PE in schools (ideally alongside education on why we do PE), workplace health interventions etc would help, but the fact is a lot of people just don't really think about their health until they're feeling the effects of their life long habits. Quite often it's already too late to avoid complications at that stage, although we do focus on exercise and education based rehab alongside medical management for cardiac and pulmonary issues, which can be very effective if the pre-existing damage isn't too severe or isn't degenerative.
For certain health risks like smoking we've seen a good long term decline in smoking rates, however someone who's spent 30 years heavily smoking before quitting at 55 has already done a lot of damage to their lungs, brain and body, even if they haven't developed emphysema. Likewise, even though resistance training is beneficial at any age, if you are taking it up at 65 because you've developed osteoporosis, then the fact is you're a few decades too late to develop much bone density. And again, this is all assuming that we can convince these older populations that they need to change their life long habits and develop healthy ones.
Whatever political changes we make, providing health and social care for an aging population is going to be extremely expensive, and is going to strain the current working age populations. Political changes are obviously still required, our rates of childhood obesity are still rising (there was a big spike during the pandemic thanks to lockdowns) and we can't afford to abandon the health of our younger populations just to focus on keeping old folks going.
On the brightside, I have seen a lot more young people (even including school kids) going to my local gym, and in general there does seem to be more awareness and general debate on these issues, so hopefully this is a real trend that we'll see evidence of in the next few years.