I can't see how they're going to help. We have to pay £40 to get one. Any forger worth their salt will be able to reproduce them, so that's sent any ideas of preventing crime/terrorism to cloud cuckoo land. There's a danger of info creep (when once they're in new information gets put on it and new people get access to that information).
For example, would people be happy if their religion was put on the card? Wouldn't bother you? What if you were Muslim and that meant the police ended up stopping you more frequently because their policy at the time meant you fit the profile for terrorism?
I'm female, white, about to hit 30s. Probably won't affect me that much. If I was in a minority group I would be SERIOUSLY concerned right now.
It won't disadvantage the poor? What about the £40 EACH they have to pay for one? What about them more likely to be stopped by police to check they have it on them and more likely to be arrested/sent to jail if they're not carrying it? (After all, they can't afford a decent lawyer).
It'll do fuck all to reduce crime rates, might make a slight dent in benefit fraud, will cost me money and has the opportunity to hit civil liberties.
The amount of money it'll cost to bring this scheme in is far more than is lost in benefit fraud each year, and is unlikely to have that great an impact on it.
And that's not even getting into the safety aspects of iris scanning if they choose to use that biometric information. Or having your address on your card, in your wallet, so if your bag/wallet is stolen a thief would immediately know which house/car to try the keys on...
Can you tell I think it's a crap idea yet?