Like I said before, caricature. While you’re free to do so, these type of sweeping generalities of mental illness of those that disagree with you is off putting. It makes it more tedious and less interesting to engage.
That’s not a negative externality. Typically a negative externality is when decision makers do not pay the full cost of the choices they make. That’s a very general definition. Another way to phrase it would be:
I don’t think there is one perfect definition, but the gist is there. Because as a society we are not comfortable allowing people to suffer from their own poor choices, the cost of those choices is borne by not just the individual, but society as a whole and that creates a negative externality. Smoking would be a good example. Smoking is legal (for now), though the benefits of smoking are quite limited, and the costs can be very large. The negative health impacts and associated increase in medical costs of smoking would seem to indicate that non-smokers as a group are probably bearing some of the cost of the negative impacts of smoking.
It’s interesting that you bring up vaccinations because they are a good example of a negative externality. Now, I believe in vaccinations as the only choice, I’ve vaccinated all my kids and the science is iron clad. But as a thought experiment, if you knew for certain that 100% of everyone else was vaccinated, does it make sense for you to vaccinate? I’d say no. The non-zero risk of infection, poor reaction, etc. are greater than the risk of contracting certain diseases if 100% of everyone else is vaccinated. But that puts the costs of vaccination on everyone else, while still enjoying the benefits of the herd immunity. This is also a free rider problem.
Another example is helmet wearing when riding a motorcycle. In CA, a law was passed to require all motorcycle riders to wear helmets. In other states, helmet wearing is not required. In one of those states a person may decide that the utility they gain from the feeling of riding without a helmet, the cost of the helmet, inconvenience of wearing one, etc. is not worth the increased risk of injury or death when riding. Perhaps they weigh the choices, and decide for them, the relatively low chance of them needing a helmet is not worth the costs. But since we as a society are not comfortable allowing this helmet-less person to suffer or die in the street from head trauma, society incurs a cost of caring for this person in the event they suffer an injury. In making the decision to not wear a helmet, they may not bear the actual cost of their choice.
So what to do about that? CA decided that’s not a choice a person can make, so they passed a law requiring helmet use. Is that okay? A lot of people would say yes I think. And much of the justification I heard around that time is that the cost of people not wearing helmets is being borne by everyone else. I personally think wearing a helmet is an obvious choice, just like seatbelts, and the potential benefits vastly outweigh the potential costs. But using this rationale, the government could apply this in a variety of what I would consider terrible ways.
Ignore for a moment the differences in public road use, licenses to drive, etc. The rationale that the choice to wear a helmet should be eliminated because of the cost it imposes on others - that same rationale can be used to limit the diet of people. It can be used to force a minimum amount of exercise. Once the health costs are a justification for intercession, there really is no limit to the amount of intrusion that can happen in the name of reducing health care costs. So I think these things are on a spectrum of levels of invasiveness. Mandating seatbelts is not very invasive. Mandating a specific caloric intake and exercise regiment is much more invasive.
A principled position is that the level of invasiveness should be minimized to the barest extent whenever possible. The argument is over what that extent is. And it’s not mental illness to make these choices. Sometimes when evaluating what is more worthwhile, people’s lives, or money and freedom, the calculus falls on the side of money and freedom, in spite of the fact we know people will die as a result. A speed limit of 10mph would greatly reduce traffic fatalities. But we as a society have decided that’s not a good choice to make. We accept people dying as a tradeoff for more efficient commerce, among other things. If there are no negative externalities, and individuals bear the cost for their own choices, then there is hardly any reason for government to intercede.
So the question for Republicans, is UHC more like the 25mph speed limit, or is it more like seatbelt laws? Over the years, I have been sufficiently convinced that the market for healthcare is different enough that it justifies different approaches than other markets that are more free, more elastic, etc. I’d support the concept of UHC, depending on how it was implemented. The EMTLA as an example, and other choices society has made reflects the discomfort with letting people suffer for poor choices is part of the negative externalities that persuaded me.
I told a social worker friend who is a staunch liberal, to be a libertarian, you have to be comfortable with a certain level of people suffering for their poor choices. Poor choices should be punished, and good choices rewarded, in general. We disagreed of course.
Again, it’s not necessarily fantastic principles. I think society as a whole would be net better off in the long run with less government. In the short run, that may cause greater suffering, or worse outcomes, but that’s okay. It’s okay for two reasons - in the long run, it will be better. Second, maximizing individual liberty is its own goal.