Hi Worcester,
Not sure if you'll read this, but it is a non sequitur, to think the high (18%+) profit
margin in residential services explains much:
- It isn't a 'secret that was revealed to parliament', but has always been declared in their annual accounts (
Centrica plc - Annual Report and Accounts 2012 - Business Review - Operating Review - British Gas)
- Services are quite a bit smaller than the energy supply side, so its 'big profits' contribute about 28% of British Gas's total profits.
- The vast majority of the residential services revenues, have nothing to do (no chance of offset/transfer pricing etc) with the energy supply side. Most revenue is from service and installation of central heating systems. Residential services do some insulation work, so it's possible some of this is cross charged from the supply side (e.g. as part of ECO). However, this part of the business is some proportion of the 100k 'other' contracts they had in 2012, versus the 8 million+ contracts they had for gas/electrical/plumbing installation and services, so not much opportunity to transfer 'excess profits' across.
You're right, that a large part of the problem is that some people can't for what ever reason 'be bothered' . Most of the big 6 have fixed deals at a discount to their standard tariff that few apply for. You'd hope that the poor in badly insulated homes would apply for the 'grants' available, so that we have fewer poor high users of energy. But although (as you say) there is an overlap between 'poor households' and 'poor quality housing' (e.g. see 'Hills report' on fuel poverty
https://www.gov.uk/government/publications/final-report-of-the-fuel-poverty-review) it is still the case that poor households spend less on energy and ('high') standing charges are regressive (low users charged relatively more). For example, our energy use is 50% of average (mainly due to insulation, but I'm a tight-wad Yorkshire man who keeps the heating below 17 deg C) , and the standing charge with the big 6 means our effective unit rate is over double in the summer and about 30% higher overall, which reduces any incentive to economise more (next move would be to disconnect from gas altogether).