£40B per year from 28.4 million households in the UK is £1408.45 per household per year. Taking the electricity cap price as £1800 per year, one ludicrously bad way to raise that much would be to increase VAT on electricity bills from 5% to 82%, increasing the cap price incl. monster VAT to £3120 per year.
Present interest paid on national debt seems to be about 70 to 100 billion pounds a year.
What would you do ?