Why are we persecuting Joe Blogski when he's helping develop the economy?
Any reasons yet for the entire population having to carry a card?
You won't have to produce the card for merely existing, only if you want to use a service, such as see a doctor (one of the reasons given for ID cards was to reduce nhs tourists), obtain benefit (another reason given is to reduce benefit fraud), use public transport (gordo has already announced security is going to be tightened up at 250 stations, shopping centres and sporting venues) - so we can probably add go shopping or watching the Villa to the list of precluded activities. There will also be an encouragement for other third parties to favour the ID card. Already employers are being threatened with massive fines if they are found to be employing an illegal and can't prove they've carried out the required identification checks. So we can probably add - getting a job to the list.
So as long as you don't want to work, claim dole, be sick, go shopping or to the gym or try to leave the country, then no one is going to force you onto the database - it's all of your own free will.