Today, the richest 10 per cent of the world’s population own more than three quarters of its wealth, while the bottom half have 2%.To halt the growing wealth gap, one economic philosopher, Ingrid Robeyns, has come up with a striking proposal - to impose legally enforced limits on people’s personal wealth. No one individual, Professor Robeyns suggests, should be allowed to have more than 10 million dollars.It's a provocative idea. And would it work in practice?(Picture: Ingrid Robeyns. Credit: Keke Keukelaar/United Agents)Presented and produced by Ed Butler