For decades, Australia has been in the grip of a child protection crisis. Despite more than 40 inquiries since 1997, and the transfer of foster care to the private sector, sexual abuse and neglect remain rife. A Four Corners investigation into residential group homes has found some of the country's most damaged children are still being placed in danger. Now, it's not state institutions in the spotlight, but private providers, beneficiaries of a multi-billion-dollar taxpayer-funded industry.