When Rex grounded its capital city services and entered into voluntary administration last week, it joined a long queue of airlines that have unsuccessfully challenged Qantas and Virgin’s duopoly. The former Australian Competition and Consumer Commission chair Rod Sims argues this was caused by ‘public policy failure’ over the allocation of slots at Sydney airport. Guardian Australia’s transport and urban affairs reporter Elias Visontay speaks to Tamsin Rose about how a lack of competition means that consumers are going to continue paying more for less