400 billionaires on the Forbes list showed an increase in social inequality

Microsoft founder Bill Gates to become the richest man in the world, with the annual increase in his personal wealth at $ 9 billion and total shareholders ' equity of $ 17 billion, more than four times, than the entire municipal debt to the city of Detroit, or the amount of enough to pay tuition for four years at the State College in the United States for 2.1 million students.