THE wine merchant who should supply a consignment of petit vin to a customer who had ordered, and paid for, a vintage wine, would render himself subject to unambiguous comment. Nay more; he would be liable to certain legal penalties. And yet his conduct would be morally indistinguishable from that of the railway company which, having accepted a first-class fare, inflicts upon the passenger that kind of company which he has paid to avoid. But the...