To some extent, this predated the Supreme Court. Dame Sian ruled in R v Pora (2001) that the courts could ignore legislation if they thought Parliament had "misfired".
More recently, in Buchanan v Jennings (2004) and Attorney-General v Leigh (2011), the courts tried to extinguish aspects of parliamentary privilege, forcing Parliament to override them with the Parliamentary Privilege Act 2014.
For better or worse, the courts have sought to set policy over pay for home carers and voting rights for prisoners, previously thought to be the preserve of the executive and Parliament.
The Supreme Court seems to believe there should be more of this type of thing.
In Ngāti Whātua v Attorney-General (2018) Dame Sian argued judges have taken too far the principle of non-interference in parliamentary proceedings.
We are still far from the American system where the Supreme Court can overturn legislation it says is unconstitutional. But it is also clear the Chief Justice's role has developed beyond what it was when Dame Sian was appointed.
In 1999, there was no suggestion the Chief Justice and her colleagues could actually make law because the Court of Appeal could always be overturned by the Privy Council.
Unfortunately, Ardern's process to appoint the new Chief Justice does not reflect the evolving role of the judiciary Wilson envisaged.
Despite Wilson's talk of an independent New Zealand judiciary and the reality of our Supreme Court having developed a distinctive New Zealand character, Ardern's process is based on the appointment of Britain's Lord Chief Justice, who does not usually even sit on their Supreme Court.
It is limited to Ardern and the existing legal elite, will be conducted in secret, and has no role for the public, Parliament or even the Opposition. Solicitor-General Una Jagose will hold secret talks with unnamed "people experienced in the law" about potential candidates.
A panel will generate a confidential shortlist which Ardern will discuss secretly with Dame Sian and unidentified "ministerial colleagues".
Ardern promises that before she makes a recommendation to the Governor-General, which Dame Patsy Reddy must accept, she will consult the Opposition.
In practice, this means the final decision will be made by a secret handshake between Ardern and Simon Bridges.
The judiciary must be the one branch of government immune from the roar of the crowd, where wisdom prevails and the rights of the most unpopular are protected. No one wants a US-style circus.
But a secret appointment process that involves only the legal elite, executive and judiciary, and excludes the legislative branch except for Ardern having a private chat with Bridges, is wholly unsatisfactory in the 21st century, especially with the court seeking a bigger policy role.
Canada may have an answer. There, the ultimate decision remains with the Prime Minister.
But, being the most important branch of government as representative of the people, Parliament has some role, with its justice and human rights committee holding a question and answer session with nominees before the final decision.
In a New Zealand context, this could see Labour's David Parker and Andrew Little,
National's Chris Finlayson and Amy Adams, NZ First's Winston Peters and the Greens' Golriz Ghahraman conducting a public discussion with nominees about the limits to parliamentary supremacy, the proper policy-making powers of the courts and the constitutional place of the Treaty of Waitangi.
It would ensure that not just Ardern and Bridges, but everyone else has those insights before the Prime Minister makes her final decision.
And it would help the public develop a better understanding of the importance of the judiciary as one of the three branches of government.
Bridges should insist Ardern reconsiders her planned process.
- Matthew Hooton is managing director of PR and corporate affairs firm Exceltium.
