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Steve Evans finds German billionaires very discreet, as well as rather frugal. Could their reticence be a defence mechanism against the surprisingly unequal distribution of personal wealth in Germany - the lowest in the Eurozone?

Sophie Reid is on a ferryboat, taking in the post-industrial landscape of Camden, New Jersey. Once this was a proud, bustling city, home to poet Walt Whitman and a brace of world-famous American brand names - but it is struggling to rebrand itself after the factories packed up and went elsewhere.

(Photo: Shoppers outside an Aldi store on April 8, 2013 in Ruesselsheim near Frankfurt, Germany. Credit: Ralph Orlowski/Getty Images)