From a 2003 report by Clive Hamilton, titled Overconsumption in Britain:
“It has sometimes been observed that, no matter how wealthy people are, they believe they need more money to be happy. A BMRB Access survey conducted for this study reveals that 61 per cent of Britons believe that they cannot afford to buy everything they really need. When we consider that the United Kingdom is one of the world’s richest countries, and that Britons today have incomes nearly three times higher than in 1950, it is remarkable that such a high proportion feel their incomes are inadequate. It is even more remarkable that almost half (46 per cent) of the richest group of households in Britain (with incomes over £35,000 a year) say they cannot afford to buy everything they really need (see Figure S1). Even amongst those with incomes in excess of £50,000, 40 per cent believe that they cannot afford everything they really need. The proportion of ‘suffering rich’ in Britain appears to be even higher than in the USA, widely regarded as the nation most obsessed with money.”
(Thanks to the blog make wealth history for its inspiring post on this subject)