It is rare to hear a prominent mainstream economist discuss so frankly (in public) the ways in which non trivial value judgments enter into welfare economics and public pronouncements of economists:
I probably shouldn't say, "I told you so," but...I told you so:
[The published version will be available soon: http://www.amazon.com/Elgar-Companion-Chicago-School-Economics/dp/1840648740]
Moreover, elsewhere I tell the story how even at Chicago-Economics (where they were early and rather trenchant critics of the claims of value-neutrality of welfare economics), the new welfare economics was adopted: http://papers.ssrn.com/sol3/papers.cfm?abstract_id=1628102
For philosophers this paper may be entertaining (or a cautionary note) because I show how Kuhn's ideas were both anticipated and then aggressively promoted to create a mythic history (and, thus stiffle dissent) at 'Chicago'.