Scrapping the bankers’ bonus cap, slashing taxes and lifting the moratorium on fracking. Liz Truss says she is ready to be ‘unpopular’ to spice up the UK financial system, however who actually advantages? The Guardian’s John Harris is joined by David Gauke, a former Conservative chief secretary to the Treasury, and Miatta Fahnbulleh, CEO of the New Economics Basis, to debate Truss’s imaginative and prescient for the nation