New South Wales in Australia recently passed a law that says if you are under the influence of alcohol and/or drugs and you fatally injure someone with a single punch then you're going to be facing a mandatory jail sentence with a minimum of eight years. The cops will breathalyse you in the aftermath of the assault and if you're over the limit then the judge has no choice but to sentence you to eight years.
http://www.abc.net.au/news/2014-01-30/one-punch-alcohol-laws-pass-in-nsw-lower-house/5227078
Legislation to tackle alcohol-fuelled violence, including a controversial law for deadly one-punch assaults, has been passed by the New South Wales Parliament.
The Lower House approved the bill at lunchtime yesterday and the Upper House voted in favour shortly before 7pm (AEDT).
Among the initiatives are mandatory eight-year prison terms for anyone who fatally punches someone while under the influence of drugs or alcohol.
The legislation also includes a new precinct in central Sydney where bars and clubs will be subject to strict new conditions, including lock-outs.
The Government announced the measures last week, in response to pressure over the death of Daniel Christie from a single punch at Kings Cross.
Politicians were forced to cancel their holidays for the special sitting of State Parliament.
Premier Barry O'Farrell told Parliament during the debate that action is needed because the courts have not been prepared to hand out the sentences that people expect.
Here in Ireland we've seen drunkeness used as part of a plea for lesser sentences or fines. Only last year a well known journalist was murdered on Camden Street with a single punch to the head. His killer got a 5.5 year sentence, with two years suspended, making it 3.5 years with 25% off for good behaviour meaning he'll likely be out in 2.5 years.
http://www.rte.ie/news/2013/0702/460161-man-jailed-for-killing-of-journalist/
It strikes me that the Irish and Australian legal systems view alcohol in vastly different terms. The Australians apply personal responsibility on people to the extent that if you get drunk and violently assault someone you're going to end up with a harsher sentence than if you had of done it sober.