Well, as Perry points out, it is simply another method of control.
Make no mistake, this is not about environmentalist voodoo science, it is about controlling people and this is the tool they are going to use.
But David is really enthused because he's a fucking nutcase.
In a speech to the Audit Commission last night, Mr Miliband said: "Imagine a country where carbon becomes a new currency. We carry bank cards that store both pounds and carbon points.
Wow! How about imagining a country where we already have a currency and where "green taxes" were used to restrict the use of these externalities. Oh, wait, hang on...
He really has gone bat-shit mad.
Why not read this rather detailed and yet economical deconstruction at The Register?