Walsh would like to advise Australian Premier John Brumby after performing a similar service in New Zealand, according to the Herald Sun.
He said: "I'd love to speak to leaders and politicians in Melbourne, and around Australia, about addiction."
"Addiction is a disease and, with help, people can get back to being responsible members of the community."
Walsh - now 62 - had been addicted to alcohol and drugs, but has been clean for 17 years. He also revealed that he decided to get sober after a visit to Australia and New Zealand in 1994.
The Eagles will be visiting Melbourne in December.