 In normative economics, theorists have often been wary of relying on concepts which are disconnected from the lay person’s intuition. Questionnaire surveys, usually performed among students, have indeed given some disturbing results. Welfarist approaches have been questioned by the results of Yaari and Bar Hillel (1984), the Pigou-Dalton principle has been critically scrutinized by Amiel and Cowell (1992), the principles of compensation and reward have obtained mixed support in Schokkaert and Devooght (1998), etc. It is of course debatable how much theorists can learn from such results (Bossert 1998).