Greens Leader David Shoebridge discusses the Greens’ promise to slash the price of groceries and break up the supermarket duopoly. “That plan would be to actually start breaking up the duopoly of Coles and Woolies,” Mr Shoebridge told News24. “If you want to unite Australians in a pub, say, ‘What do you think of Coles and Woolies?’ “This sense of anger about this duopoly, taking billions and billions of dollars in profit, squeezing up prices, acting uncompetitively.”