dambisa moyo is a global economist.bank and wall street has named her one of the most influential people in the world. she is fascinated by the biggest trends in economics, from the politics of development in africa, to the price of commodities in china. now she is turning her attention to inequality. dambisa: income inequality is particularly problematic in as much as it is a defining factor in many societies for where a society's living standards are going. the data on income inequality has shown that it has grown worse over the last couple of decades. in fact, over the last 30 years, we have seen income equality worsen across the united states, the united kingdom, and across much of europe. in the same vein, we has seen the average income of the top 1% in the united states today is 30 times the average income of the rest of the population, the 99%. compare this with 30 years ago, 1978, when it was simply 10 times higher for the top 1%. ♪ narrator: economists worry that inequality ushers in a range of social problems.