The economists Corbyn recruited are now deserting: Blanchflower, Piketty, Murphy (Piketty was apparently going anyway but still says he is 'concerned with the Brexit vote, and with the weak campaign of Labour'). Wren-Lewis, Mazzucato et al have said they are 'unhappy that the Labour leadership has not campaigned more strongly to avoid' Leave. Do these people mean anything to the membership?