I follow the YouTube postings of a maverick young economist called Gary Stevenson, author of The Trading Game. Whatever you think of Gary, he is absolutely right about one thing. Economists, by using what are called ‘Single Representative Agent’ models, have taken a dangerous wrong turn. Such simplistic models, which contain the convenient but absurd assumption that what is good for the average person must be proportionately good for everybody else, have allowed economists to make confident pronouncements on policy while ignoring social and intergenerational inequality completely.