Edit: wow, a lot of discussion in the time it took to write this. I'll post it anyway in the hopes I wasn't preempted.
ed boy, here's my response to your (very clear) argument.
Returning to the issue of government vaccinations against drugs, let me know what precise step(s) in the following chain of thought you disagree with:
-people gain short term enjoyment from taking some drugs
Agreed. But don't forget the long-term or personal benefits. Many people take drugs for inspiration, insight, to exercise personal freedom, or to have a religious experience. We must account for these.
-people gain long term disadvantages from taking those same drugs
Some people face
some long-term disadvantages from drug use. The problem is that there is essentially zero science on the long-term effects of drug use, and the effects differ greatly from drug to drug. Most of the "facts" I see bandied about are straight-up prohibition-era lies that are still perpetuated, or essentially mindless propaganda. LSD affects your chromosomes? Really? C'mon, guys.
While there are obviously some concrete disadvantages to illegal drug use, many of these harms are more related to the fact that the drug is illegal than that it causes physical or psychological harm. That means we need to consider an alternative in our cost/benefit analysis: legalization.
-for some drugs, the disadvantages outweigh enjoyment is all or almost all cases
See above. There may be anecdotal evidence about this, but essentially zero science. I might personally agree with this regarding one, maybe two drugs. But that opinion isn't based upon science. Also cost/benefit of drug analysis of drug use are certain to exclude the value of a drug user's personal development/religious experience/insight/artistic inspiration. Even if it did, how do we measure or value something like that?[/quote]
-when deciding whether or not to take drugs, some people misjudge the relative value of the short term enjoyment and the long term disadvantages
Absolutely agree. We also do this in starting and ending personal relationships, when making education decisions, and just about every other thing we do. Look up
hyperbolic discounting. It's a universal human behavior not limited to drug use, or even humans for that matter.
-therefore, those people take drugs when they should not
-therefore, those people have negative benefit from taking drugs
Sure, but this still isn't different from other bad decisions individuals make.
-the purpose (or one of the purposes) of the government is to maximise the total benefit in society in the long term
Disagree. First of all, any Republican would disagree with you on dogmatic grounds. At the other end of the political spectrum you have
liberalism and its focus on protecting liberty and human rights. The position you describe is usually called
paternalism, and there is a lot of legitimate and persuasive criticism of paternalistic politics. Dictators and totalitarian regimes frequently justify their power with paternalistic arguments.
-therefore, if an action results in negative benefit, the government must attempt to reduce the effects of this negative benefit until the point where the costs of reducing it further outweigh the amount it would be reduced by.
You are essentially stating the standard for utilitarian morality, except that you're also saying the government should enforce that morality through the law. This is only true if utilitarian morality is true, and if it's the government's job to enforce morality through the law. Most people disagree with both of those propositions.
-people taking these drugs results in negative benefit, so the government must, if the costs of doing so are not outweighed by the long term increase in benefit, do at least one of these three things:
--Increase the enjoyment of the drugs until it reaches the point where the enjoyment outweighs the long term negative effects
--Decrease the negative effects until they are outweighed by the enjoyment
Legalize it. See above. Also, there's still no science on the negative effects.
--Decrease the number of people who are taking drugs
-Now, consider a vaccination against these drugs
-By vaccinating someone against these drugs, they do not gain the benefits of taking them
-with the benefits gone, they have no incentive to take drugs
-therefore, even those that are prone to misjudging the effects will not take drugs
-so the total negative benefits will decrease
-so, provided both of the following hold:
--the vaccine works
--the cost of giving people the vaccine is more cost-effective than increasing the benefits or decreasing the negative effects of the drugs-it is logical for the government to try to vaccinate as many people as possible
note that I am only considering those who do not have an addiction to drugs in the above.
In this second CBA you fail to account for the value of protecting civil liberties and the importance of individual choice to a functioning society.
To sum, you're employing a cost/benefit analysis to an issue where we don't know what the costs
or the benefits are. You have an unpopular (and in my opinion unsupportable) understanding of morality and the role of government. Your cost/benefit analysis of government action fails to account for fundamental human rights. Finally, you don't consider alternate courses of action (legalization) that offer a better solution than vaccination.