On that basis, the Greens should have included the nearly $50,000 in taxpayer-provided money drawn from its parliamentary funding to pay eight staff to collect signatures for the petition needed to force the referendum.
The Greens might have been better advised to have been upfront about the cost of the referendum as being the justified price of democracy, rather than trying to hang financial responsibility for the ballot on the Government.
However, the sleight of hand might be designed to deflect criticism that by the time the referendum is held, the partial floats of up to 49 per cent of the three state-owned electricity generators - Mighty River Power, Meridian Energy and Genesis Energy - will be close to completion and therefore a plebiscite is a waste of money. John Key was certainly trying to pin that charge on Opposition parties yesterday.
That the ground is starting to shift from under the Opposition was apparent in those parties' calls for the asset sales programme to be halted immediately until a referendum can be held. There was fat chance of National agreeing to that.
There is another risk for the Opposition in the referendum losing its relevance - that voter turnout is consequently low, enabling National to claim victory in likely defeat.
The smart thing for the Opposition to do would be to forgo the referendum and earn kudos for saving taxpayers $9 million. The politics are likely to get in the way of that happening, however.