I believe that Labor voters can have no respect for a party, certainly not their own party, if in a time of great natioanl crisis, it sees no alternative but to carry out the policy of its opponents.
- John Curtin, House of Representatives, 24 June, 1931
Back in 2002, John Button wrote a Quarterly Essay on Federal Labor. Part of his recommendations was the decoupling of unions from the Labor Party (this was during the "60-40" rules debate under Crean).
In the following Quarterly Essay, Barry Jones made a few interesting points in the correspondence, but the one I'd like to focus on is to do with electoral numbers and unions.
Jones says "The ALP needs 5 million votes to win a federal election comfortably. The trade unions may be able to pull in 2 million of those votes -- and maintaining their commitment to Labor is essential."
This is a very good point. I read a lot about the remaining 3 million voters Labor needs to win, but as Jones points out, if Labor wins the 3 million but loses the 2 million, the result is still a loss.
I think the 2 million votes must come from the figures on union membership. The most recent ABS data puts union membership around 1.7 million (or 18%). I think Jones overestimates the raw union numbers. I've seen numbers that about 65% of union members vote Labor, putting direct union contribution to the Labor "pile" at 1.15 million. However, there are significant numbers of people who are former union members and would have a higher than average likelihood of voting Labor. So that would get us to the 2 million mark.
However, unions do a lot to get this unusually high level of support for Labor -- lots of campaigning both during and before the election. Going by Labor's very low primary vote in 2010, the union effect is a significant benefit.
The point of all this really is twofold.
Firstly, unions provide a significant electoral boost to Labor, even when they don't run massive, effective Rights at Work style campaigns.
Secondly, Labor is the only party willing and capable of delivering benefits for union members, and unions. Evidence from almost every Liberal/National government through Australia's history demonstrates that they are anti-worker and anti-union.
The notion that unions and Labor should "divorce" in my view is wrongheaded.