What Have the UK Government Got Against Energy Efficiency?

The UK's government has been eventually forced, kicking and screaming, to levy a 'windfall tax' on the excess profits of North Sea oil and gas companies. The Chancellor felt so bad about this, he simultaneously offered them a 91% tax break to facilitate the location and development of new reserves. The tax break will result in between £2.5bn and £5.7bn being handed back to 'big oil'. Alternatively, a £3bn energy efficiency programme could have been used to permanently upgrade 2.1m UK homes (https://www.theguardian.com/environment/2022/may/31/sunak-uk-oil-subsidy-could-have-insulated-2m-homes-says-thinktank). The energy efficiency programme would simply involve insulating the lofts and walls of homes, making their occupants less reliant on gas for heating. At present prices, such insulation would cut an average of almost £350 a year from home energy bills. We don't need more oil and gas, we just need to use our currently available energy more efficiently! Increased oil and gas extraction from the North Sea and leaky home insulation will combine to massively elevate UK 'greenhouse gas' emissions. What planet do they live on?