Should Britain tax wealth more heavily? With the government under pressure to find billions for public services and defence, Andy Burnham has refused to rule out a wealth tax. 

But would taxing the richest households actually raise significant money, or drive wealth, investment and entrepreneurs out of the country?

On The Fourcast, Matt Frei is joined by Gabriel Zucman, economist and author of 'We Need to Tax Billionaires' and economist Arthur Laffer, creator of the Laffer Curve.

So how unequal is Britain? Has wealth become undertaxed compared with income? And if Britain doesn't tax the richest more, where else should the government find the money?