In this article on the BBC, Charles Clarke tells us that "There would be no compulsion on anybody to show their ID card in the street." So as long as you live on the street, and sleep on the street at nights, buy your food and drink from street stalls, urinate and defecate on the street, you won't need a card. Cool.
So you won't need to carry it round with you? When will you need it? When you enter or leave the country? Just like we already do with passports? Opening bank accounts and buying houses? Does anyone really believe that the allegedly thousands of evil-doers lurking in our midst won't be able to do these things? And that this will stop them from planning their evil plots?
Think of what we could do to benefit society with all that money, how much suffering we could alleviate. Makes me really angry.