Megan McArdle on Behavioral Economics,
I must say this is rather good (hopefully Ms. McArdle wont mind copying the entire post).
The post below also applies to behavioural economics, which the left seems to believe is a magical proof of the benevolence of government intervention, because after all, people are stupid, so they need the government to protect them from themselves. My take is a little subtler than that:
1) People are often stupid
2) Bureaucrats are the same stupid people, with bad incentives.
Indeed. Oh and read Ms. McArdle’s post on Medicare linked above.