Decadent stay-at-home wives who take their rich husbands for a ride have finally been rumbled, says Tara Winter Wilson Once upon a time, there was a truth, universally acknowledged, that a man with a powerful job and a beautiful house must be in want of a wife – preferably of the trophy variety. Domesticated, docile yet dazzling, she was the perfect finishing touch. Not any more. According to research to be published in the journal Labour Economics, the earnings gap between married couples is narrowing. While in the 1980s it was the case that the higher a professional man's salary...