An Oxfam briefing paper published in January outlines the 'serious and worrying trend' of rising wealth concentrations, opportunity capture and unequal political representation:
• Almost half of the world’s wealth is now owned by just one percent of the population.
• The wealth of the one percent richest people in the world amounts to $110 trillion. That’s 65 times the total wealth of the bottom half of the world’s population.
• The bottom half of the world’s population owns the same as the richest 85 people in the world.
• Seven out of ten people live in countries where economic inequality has increased in the last 30 years.
• The richest one percent increased their share of income in 24 out of 26 countries for which we have data between 1980 and 2012.
• In the US, the wealthiest one percent captured 95 percent of post-financial crisis growth since 2009, while the bottom 90 percent became poorer.
http://www.oxfam.org/sites/www.oxfam.org/files/bp-working-for-few-political-capture-economic-inequality-200114-en.pdf