An Opposition Speaker - the goal of the next Labour Party Leader
No matter who the Labour Party Coven selects to fight Key in 2014 - Mr Likable or Mr Ready Now, the first act of leadership would be for the new Labour Party leader to turn down the convention that see's the Opposition stand down an MP to allow the Government to elect it's Speaker.
They could argue that the controversial legislation that National wish to ram through should be scrutinized to the highest level and only an Opposition Speaker could ensure that level of scrutiny.
If Labour refused to pull out an MP, National would be forced to lose their majority if they selected Lockwood meaning the Maori Party would be kingmaker in any legislation meaning Asset Sales couldn't pass.
Instead of that outcome, National agree to an Opposition Speaker, either Trevor Mallard or Dr Pita Sharples.
So the question to ask to evaluate if this idea would be worthwhile is, how much does Labour oppose State Assets?