This week the Ideas team look at taxation - a way to a utopian society? Oxfam New Zealand senior policy advisor Sarah Meads and CTU economist Bill Rosenberg make the case for a tobin - or Robin Hood - tax; Susan Guthrie, co-author of the 'Big Kahuna', discusses the tax implications of a universal basic income or UBI and; economic historian Brian Easton takes us through the history of tax in New Zealand.