Fund manager Peter Coman says the PIP Fund is interested in investing in the new Wiri prison public-private partnership but not if it includes managing prisoners as part of the package.

New Zealanders are yet to support infrastructure development to meet future demand, National Infrastructure Advisory Board chairman Dr Rod Carr says.

Updated long-range projections for Government debt are less unnerving than last year's but still unsustainable, the Treasury says.

Tax revenue was bigger than forecast and spending lower in the 11 months to the end of May, says Treasury.

Westpac economists expect house prices to fall about 2 per cent this year and another 2 per cent next year.

Bidders for the government's $1.5b ultra-fast broadband fund will now be invited to supply plans for "lit" fibre.

New Zealand's top broadcasting bureaucrat is tuning out of the sector to be Climate Change Ambassador.

The Government has embarked on a path to abolish building depreciation on virtually every building type and could hit depreciation claims on commercial building fit-outs in future, says Bayleys Valuations director John Freeman.