Bank chiefs prepare for Royal Commission grilling amid to confront "culture of greed" evidence. I speak with Macquarie University professor Elizabeth Sheedy

Commonwealth Bank chief executive Matt Comyn and chairman Catherine Livingstone will face the final round of the financial services commission amid expectations of intense grillings. 

Meanwhile, Macquarie University associate professor Elizabeth Sheedy says the "balanced scorecard" used by banks does not improve productivity and tempts executives to chase bonuses rather than acting in the interests of customers. 

Elizabeth Sheedy speaks with the ABC's Peter Ryan.