As an Englishman, the horror stories of American healthcare make me extremely nervous about our Conservative government's work to privatise our national healthcare. I like the NHS as it is
Don't let them.
I would argue as with most things there is a balance that can be achieved and may be necessary.
I very much agree with this, although not with the implications of the questions that follow it. There is a balance and it can be achieved, although it is a fine balance and its impacted on by numerous external and internal pressures.
To answer your hypotheticals from the view of someone who lives and works as a health professional within an entirely tax-funded health care system:
For example, in a entirely tax-funded system (cost is hidden from patient), if someone refuses to get a flu vaccine each year (which is free), then contracts the flu and puts a strain on the medical system (and larger society) to care for them, how is the behavior discouraged? Is it fair to force everyone to have the vaccine? What about other preventative care?
It's not discouraged, that's coming at it from the wrong angle. Individuals have a strong drive to ignore most negatively-framed advice that might be given to them. The key to achieving success in a public health campaign is to educate on, emphasize and encourage the positive outcomes of good preventative health strategies rather than discourage ignoring them. My apologies for the double negative, but successful outcomes in this area are very much about perception.
Flu vaccines don't offer 100% protection against all forms of influenza. They do offer some benefit in indices of time to recovery and time to return to work (ie, indices of morbidity/cost to health system and productivity) but only significantly in high-risk populations. Therefore in the system I have around me, the influenza vaccine is only offered free of charge to health care workers, diabetics, those at extremes of age, those with pre-existing health conditions that would worsen significantly under the effects of influenza (heart failure, lung/airway disease, cystic fibrosis and so on). There are a few other groups that get the benefit of free flu vaccine also.
Those patients outside these groups wishing to obtain a seasonal flu vaccine are able to do so at their own cost, which is usually subsidised by the government under what's called a Pharmaceuticals Benefits Scheme - the same scheme our government uses to make most medicines affordable to those needing them.
There are no mandatory vaccines in our health system although that is something currently being considered by various state governments to address lowered levels of herd immunity that studies have shown to be developing over the last decade.
What about the person who does not make good dietary or health choices, does not have an annual physical, and then is rushed to the hospital when their body final collapses and they are diagnosed with Type 2 Diabetes? Once they are stable, is it society's burden to pay for the individual's choices?
Our society's view is that - as a developed first-world nation of reasonable affluence and social comfort - it is the role of our society and its government to provide support for its people across a variety of fronts. Support in health care is one of these fronts. In doing so we aim to effect the return of individuals to health and productivity as rapidly as possible without the need to enter into high levels of personal debt or forego basics of healthcare in the process. In those cases where a return to full or functional pre-morbid levels of productivity isn't possible we have other welfare networks in place to support them as well. Nothing occurs in a vacuum, ideally.
We seem to get by with this view. We have a good quality of life (a generalisation of course), a satisfactory level of infrastructure and an education system that ranks quite highly among similarly developed nations. We have good systems of 'free' (ie, user does not pay) health care and social support. We have welfare systems which public pressure forces continued review of. We have a 3-year election cycle at local, state and federal levels to ensure that if due diligence is not undertaken we can at least get rid of those responsible in favour of those who may be able to.
That said, two of the key obstacles to such a system are size of the population (larger populations obviously become exponentially harder to support in such a manner) stacked against GDP and national/international debt levels. What works for us with a population that approaches only 30 million will not necessarily work in some African, SE Asian, South American or North American nations without significant support from medical charities or NGOs and is almost certainly never going to be a viable option for nations like India and China each of whose populations exceed 1 billion people.
At the same time, when parents are making the right choices for their child, including annual checkups, and they rush to the hospital when the child is attempting to expel acid through their lungs due to Type 1 Diabetes, the last thing I want those parents to worry about is "can I pay for this?" The same goes for the person working their job and having their hand crushed or leg broken. These are generally not the result of a pattern of poor choices by the individual.
The point of a taxpayer-funded health system isn't to lay blame or pass judgement on who gets treatment and who doesn't. It's among the first tenets of the Hippocratic Oath, which - although it's fallen out of favour in the years since the Greek gods you swore it to faded from popular worship - is still a pretty good ethical document for physicians to bear in mind. Disease, in general, doesn't discriminate and while it can be argued that patterns of poor health choices inevitably result in some sort of adverse outcome related to them in my experience it's not that black-and-white in actual practise.
The morbidly obese smoker with diabetes and severe heart disease doesn't choose to be crushed in a multiple vehicle high speed motor accident, for instance, but his or her other comorbidities are going to have a serious health and dollar impact on their treatment and - if they survive - their recovery.
Those of us working inside these health systems understand this on multiple levels. I figure I've seen and treated in excess of 30 to 40 thousand individuals in the course of my career. I have empathy for all of them, even as I silently curse and rail against many of them for ignoring health advice that could have prevented or lessened their problems and saved the government's health bill anywhere from few hundred to thousands on thousands of dollars.
The problem for a health worker in that specific situation is you're there to deal with the issues that are facing you at that point in time. There's no point in wasting 10 minutes berating a 70-year old struggling for breath because of his emphysema about the smoking habit of 150+ pack years (3 packets a day for 50+ years) that brought him to your doorstep.
A) It's not going to help him breath any better.
B) He probably started smoking before he even knew exactly how bad it was for him.
Afterwards, you offer him nicotine replacement and tell him to quit smoking or he doesn't get the home O2 he desperately needs (because those are the barriers the government puts on that treatment), you tell him to get a regular chest x-ray (and network with his GP or arrange it yourself to make sure it's followed up on) because of his risk of lung cancer and you put what social supports he needs in place. But you still do whatever you can for him in all those respects.
Likewise with the obese, Type II diabetic whose leg is gangrenous and is rapidly entering septic shock with its attendant sequelae of multiple organ failure and death. What he needs immediately is stat antibiotics, a saline drip, a knife to release any abscess followed quickly by a high-risk general or spinal anaesthetic and a probable amputation. You can worry about the diabetic education, advice on weight loss and lifestyle changes, the problems he'll have achieving mobility and any level of pre-morbid independent function along with a full medical screen for other complications of diabetes if he survives and recovers from that.
In those situations, we don't get to sit in philosophically constructed ivory towers and decide who's worthy of treatment and who's not. And from my point of view as a health professional, we also shouldn't be adding up in some part of our heads how much we or our hospital/health institution stand to make off the poor rube for trying to stop him dying a bad, early death. To me, that's grossly unethical and one of the many things I cannot understand about systems that don't provide some measure of tax-funded support.
Nor is it enough for us to just treat the problems as they arrive. Health care professionals and administrators working in a taxpayer funded system are also responsible for two areas which grease the wheels of said system:
1) It's incumbent on us to be involved with preventative medicine and public health strategies either in actively promoting them, accessing them and following up on our patient's utilisation of them or in researching and developing them, making them cost-effective and then selling them to the government for approval. It's not enough to be just a good doctor, nurse or allied health/social work professional in this type of system - you have to have vision and be able to innovate as well.
2) We have to be gatekeepers - we have to recognise that for every investigation/therapy we order and get approved for one patient there's another patient who's potentially going without or being forced to wait for that same investigation/therapy. Resources are finite. To my way of thinking this makes us, in general, far more efficient and better at our jobs. We don't order a slew of ineffectual investigations with a scattergun approach - we survey, determine the possibles and try to work through that list by process of elimination and careful choice of relevant investigations.
There's one further thing to add, in the context of the specific tax-funded health care system I'm part of.
We still have private health care. It doesn't really cost much, and it provides a great deal for those who can access it.
We encourage people to adopt private health care cover to decrease the utilization (and therefore cost/strain of resources) of the public health system for a number of reasons. These include access to surgeon/physician of your choice (rather than the on-call doctor of the day or even a physician/surgeon in specialist training), shorter waiting lists for routine non-life threatening procedures and treatments, local access to certain forms of treatment (radiation theraphy and chemotherapy for cancer where a patient might have to travel 800km+ to access the same treatments at public health facilities, as an example) and tax deductions/benefits that (in some cases) cover the cost of the health insurance itself.