The Green Party's official review into the Budget Responsibility Rules has suggested the party scrap them and spend much more.

The review, written by a group of prominent party members, has been leaked to Stuff ahead of being sent out for consultation on Thursday evening.

It suggests the Budget Responsibility Rules - a set of targets to keep government debt and spending low signed up to by the Greens and Labour ahead of the last election - "embed neoliberalism".

STUFF Budget 2019: Green Party co-leaders James Shaw and Marama Davidson comment on welfare and income.

"The Green Party opposes fiscal strategy which includes arbitrary point targets for government debt and government expenditure," the review notes.

"The current approach to fiscal management embeds neoliberalism in both legislation and in the way the national accounts are prepared."

The review followed serious anger from members at the party for its commitment to the Budget Responsibility Rules - a decision itself driven by the party's MPs more than its members.

The review sets out a proposed new fiscal strategy for the party to be inserted into its wider economic policy, which would "incorporate the need to transition to a circular economy which does not rely on unlimited growth" and "recognises the multiple roles of the tax system as set out in the Taxation section of this Policy".

The party did not have a specific fiscal policy prior to this.

David White/Stuff The rules were established ahead of the 2017 election between the Greens and Labour.

"The Green Party supports a broader and more balanced approach to fiscal policy in line with both the overall principles of this Policy, and the recognition that unlimited material growth is impossible," the reviewers write.

Fiscal strategy should "maintain macroeconomic stability, including full employment and controlled inflation" and "uses the full range of tools available to finance government expenditure, and choose the mix between them on the basis of their effects on broader goals".

The review was commissioned, its writers say, because "we are a party that believes in bold, progressive economic policies that focus on the health of our planet and the well-being of our people".

It is intended to inform the party's 2020 election platform.

Co-leader Marama Davidson expressed serious skepticism towards the budget rules when she ran for co-leader of the party.

Her fellow co-leader James Shaw, who is also the associate minister of finance, is understood to have been one of the driving forces behind the rules in caucus - seeing them as necessary to making the Greens more electable.

Green members are not alone in their distaste for the budget rules, with economists from several political slants arguing the time is ripe for a boost in public spending, as interest rates are very low.

The party has pushed for more spending in Government, particularly in the welfare system.

The review asks members to provide feedback on the proposed new fiscal policy.

A spokesman for the Green Party said the document was due to go out for member consultation and it was not appropriate to comment during ratification.

It's understood the party will come to a firmer position on its fiscal stance ahead of the 2020 election.