Introduction

Liesel Pritzker Simmons and her husband Ian Simmons are billionaires who come from successful US business families. Liesel's family is best known for founding Hyatt hotels. Both say the the US government should be collecting more tax from super-rich people like them. We asked them why. And Dr Ted Klontz, associate professor of practice and financial psychology at Creighton University in the US, explains the psychology of a billionaire.

(Photo: A gold Ferrari parked outside an expensive boutique in London, Credit: Getty Images)