Its a discount against the bill not a £400 bonus in the bank account.
How do you means test as well? I pay energy bill and Mrs pays council tax. I am sure this will be similar for lots of people so trying to means test with multiple different departments/companies is a nightmare and would cost a fortune. SO this will be more efficient if you are looking at it purely from monetary terms
Depends how you measure efficiency I guess. I think it’s a bloody waste of money giving people who don’t need it £400.
I know I sound stubborn but I simply do not believe that the government doesn’t have the means to estimate household incomes.