The slow economic strangulation of the Freemans and millions of other middle-class Americans started long before the Great Recession, which merely exacerbated the "personal recession" that ordinary Americans had been suffering for years. Dubbed "median wage stagnation" by economists, the annual incomes of the bottom 90 per cent of US families have been essentially flat since 1973 -- having risen by only 10 per cent in real terms over the past 37 years. That means most Americans have been treading water for more than a generation. Over the same period the incomes of the top 1 per cent have tripled. In 1973, chief executives were on average paid 26 times the median income. Now the multiple is above 300.