That has prompted speculation that the Government will have to soften the recommendations or face very difficult job selling the policy in the next election.
The Working Group was mandated to ensure any proposal was revenue neutral for the Government.
Based on estimates that the CGT could generate around $300 million in Crown revenue in its first year and as much as $6 billion by 2031 - that could mean any policy changes come with tax cuts for many workers.
In the statement today the Government reiterated that any policy changes arising from the report would not come into force until 1 April 2021 - giving New Zealanders the chance to vote on any decision it makes.
Tax Working Group chairman Sir Michael Cullen told the Herald last week that the report should not be viewed as "as a take it or leave it" proposal for the Government
"People are assuming because there is a report it has to happen," he says. "There is a long way to go in terms of internal government discussions, in terms of discussion papers, the generic tax policy process, select committee and then, of course, a small thing called the election," he said.