An Elusive Problem Solved: Robert Shiller Explains How We Can Fix Income Inequality Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email An income inequality index would kick in to raise taxes on the rich anytime the gap between rich and poor becomes too vast. ( Ian Ellery / Getty ) Produced by Kristen Meinzer Produced by PRI and WNYC