The US has the highest rate of poverty among wealthy countries. In 2012 about 15% of the US had income below the poverty level, which means approximately 46.5 million people made less than $23K for a family of four with two adults and two children. In this video, Paul Krugman, a Nobel Prize winner in Economic Sciences, describes the income gap in the US and adds that there is greater possibility for social mobility in Europe compared to the US