Those of us who believe in freedom must believe also in the freedom of individuals to make their own mistakes. If a man knowingly prefers to live for today, to use his resources for current enjoyment, deliberately choosing a penurious old age, by what right do we prevent him from doing so? We may argue with him, seek to persuade him that he is wrong, but are we entitled to use coercion to prevent him from doing what he chooses to do? Is there not always the possibility that he is right and that we are wrong? Humility is the distinguishing virtue of the believer in freedom; arrogance, of the paternalist.
Milton Friedman – Capitalism & Freedom p.188