That's simply not enough," she said."The vast majority … 64 per cent is spent on law enforcement."We've got good evidence from research that we've done that it would be far better to refer people who use drugs into harm reduction and treatment services than put them through the criminal justice system."Marg Quon has spent years reflecting on the struggles her son Kris faced and has written a book about him.When her son was just five, his father died in a workplace accident, Ms Quon said."We presented well to the outside world, so everybody thought we were just fine, but we weren't," she said.By age 14, Kris was smoking cannabis When he was 18 years old, Kris injected amphetamine for the first time.Ms Quon said Kris, who had served a suspended sentence for drug possession and dealing, wanted to get help but found it was not easy to access.Professor Ritter said that was a common experience."What we've found is that only half the number of people who are seeking treatment are able to receive it," she said."So we have this massive unmet demand for alcohol and other drug treatment in Australia