A report from the charity Oxfam said eight billionaires are as rich as half the world. They have as much money as the 3.6 billion poorest people. The richest man is Microsoft's founder. He has $75 billion. Oxfam said, "The gap between the rich and the poor is far greater than we thought." It said this was unfair. Oxfam said it was shocking that one in 10 people survive on less than $2 a day. This means millions of people are very, very poor. It said governments only care about big businesses and a "wealthy elite". An economist said the report was unfair because Oxfam was attacking rich people. He said Oxfam should focus on ways to increase growth instead of complaining about the rich.