Official figures show almost 6000 drivers faced a third or subsequent drink-driving charge last year. Men made up 86 per cent of the cases and the most common age bracket was 41 to 45.
Brooking pointed to studies - one predicted a person would drive drunk around 300 times before being caught. The other put that figure around 87. "It's a huge problem," he said.
While some repeat drink-drivers simply had problems making safe decisions, many more suffered from alcohol dependency or abuse, he said. Only a small number of offenders were referred for an assessment and the treatment sector was also under-funded, Brooking said.
Telfer's lawyer Jacinda Younger described the latest case as "extremely sad".
"She was horrified about what she had done. She's a lovely lady, she's just had a hell of a run. It's an extremely sad case of a lady who in all other respects is a normal member of society."
Younger said Telfer had been sober for some time but lapsed back into drinking after her partner died in 2010.
"She was devastated. She fell off the wagon and things spiralled out of control."
The extremely high reading indicated she was severely alcohol dependent.
"If a normal person had that level, they would be unconscious and heading towards alcohol poisoning or death," the lawyer said.
Younger said Telfer had vowed to never drive again after the latest offences.