What impact would a new wealth tax have?

More than 100 UK-based millionaires, including former Match of the Day presenter Gary Lineker, have signed a letter urging new Prime Minister Andy Burnham to tax their wealth. Organised by the group Patriotic Millionaires UK, the letter called for higher taxes not on everyday workers, but on the very richest in the UK, an annual 2% tax on wealth above £10 million.Is it time we do the same here? Would this greatly benefit our economy or make little difference?Joining Shane to discuss this is Economist, Austin Hughes.