Kind of lucky only to get community service and a some counselling. The article has been rewritten slightly since it was first posted and I agree with the sentiments of the NZ representative that the sentence was hardly sufficient. Surely monetary compensation or even jail time should be necessitated.
I assume either (a) she is a parent who cannot go to jail; (b) the fact she was drunk contributed to what was uncharacteristic behaviour (i.e. being intoxicated is a mitigating factor in judgement, even if voluntary); (c) she has an otherwise squeaky clean record; (d) no one was severely impacted to the point that the flight needed to be diverted (i.e. she wasn't "that" big of a threat); or (e) there were problems in the jurisdiction / witnesses which meant successful, full prosecution could not be achieved.
I'd like to think NZ have her on their code red list or equivalent, now. In New Zealand, that's somewhat significant because there aren't as many travel options from New Zealand as there are in Australia, let alone to Bali.