When is Zero not Zero?

I'd missed this - it is now proposed that 0%=56%. That's the gist of the Zero-Carbon Hub's proposal for 2016 building regs: a "zero-carbon home" may have emissions as great as just 44% below 2006 building regs. This is nuts. These buildings will be around for years and years - not going for stringent regs now will simply burden all of us with the need to cut emissions even further in other walks of life. This was supposed to be the "greenest government ever" - it's hardly khaki at the moment. Oh, and to top it all the HCA will not be required to achieve Code Level 4 for new homes funded via it as previously announced.
What's the matter with the country when its building industry's core competence is lobbying ministers so that it can remain a bunch if feeble fannies foisting crap homes on the poor captive public? Shame on the lot of them.