Kemal Dervis calls for strong policies to combat income inequality.  Without potent policies aimed at counteracting these trends, inequality will almost certainly continue to rise in the coming years. Restoring some balance to the income distribution and encouraging social mobility, while strengthening incentives for innovation and growth, will be among the most important – and formidable – challenges of the twenty-first century.   Inequality

Apparently one big problem going forward is that very wealthy men and very wealthy women are marrying each other.