While Hilary Putnam was not a friend of free-market economics and remained a socialist throughout his life, he made important contributions to the subject of ethics.
Human beings do not have constant value scales, but change their goals constantly as the world around them changes. This habit of changing goals does not make a consumer "irrational."
The assertion that “tax-financed public goods can make us all better off” is just that: an assertion. As Rothbard showed, there is no reason to just assume consumers would pay for these amenities were they not forced to through taxation.
Interpersonal utility can't be measured. After all, if you can't measure a single person's utility, it makes no sense at all to measure one person's utility against that of another.
Mises thought that social cooperation through the free market resulted in peace and prosperity, regardless of whether people or societies accepted this or not.
Some people use the concept of negative externalities to argue for government to force people toward "what is best for them." An example of this is the call for a consumption tax.
A given goal dictates the specific means that an individual will choose for the attainment of that end. People make choices that they think will help them achieve an end.
Some anti-Brexit pundits tried to frame the Brexit debate as one of savvy economics-minded people against economic illiterates. These people missed the point.
