He had wanted the support of the party's parliamentary leader John Boscawen, who showed little modesty in proclaiming that the Act Party had saved the right to silence.
"I was asked by the Justice Minister, by Mr Power, in his office, to provide him the five votes to pass this bill. I have no doubt that had I given that support in August, this bill would have passed," Mr Boscawen trumpeted.
"When I took this back to the Act caucus, Act's five MPs were absolutely united that we would not support this bill in the form it was presented to the house."
While he could claim some credit, bestowing it on his party is less convincing because a majority of his caucus supported a proposal to remove the right to silence, if that had been the will of the Rules Committee - a panel of legal experts.
National MP Chester Borrows said it was Mr Power who deserved the credit for securing broad consensus.
"There is a need to have some consensus, not only because of the numbers in this debating chamber, but also the need to have enduring criminal law so people know the law they live under."
But Labour MP Carmel Sepuloni said the party's justice spokesman Charles Chauvel was the saviour, as it was his minority report that drew the line in the sand that other parties lined up behind.
Mr Chauvel proposed further changes at the bill's committee stage, including a requirement for the judge to give an indication of the sentence, which would allow a plea on that basis and potentially save court time.
The bill passed its second reading with the Green and Mana Parties and Chris Carter opposing. It should pass into law before the House rises next week.