In the UK, the richest 1% take about 14% of all income - the highest since World War II but lower than the interwar period, according to the London School of Economics' Centre for Economic Performance.

BBC: The rich: Exactly what does the terminology mean?

They often invest respectable sums in computers and information technology but do not seem to reap the same productivity gains from it as many American firms, according to John van Reenen and Nick Bloom of the Centre for Economic Performance at the London School of Economics.

ECONOMIST: A lost opportunity