The Coalition’s nuclear power plan assumes a $4 trillion hit to economic output over the next 25 years, the government says, as a new poll shows last week’s long-awaited release of the policy costings has had no immediate impact on the popularity of the energy source.

Amid widespread criticism of the assumptions underpinning the Coalition’s claim that it can produce a net zero electricity sector by 2050 for $263 billion less than Labor, Treasurer Jim Chalmers said the most ludicrous proposition was that the economy would need 40 per cent less energy by that date than was currently forecast.