These ID cards are the slippery slope. There's so much fear over immigration that ticket is being used to test ID cards schemes, but soon enough they'll be coming for the rest of us.
The big problems are that the Govt have not been honest about what data will be held on the our cards. The cost is also waved over, but you can guarantee they won't be cheap. Also, I'm a bit pissed off at the notion that I will be forced to buy one, I'm not sure that is legal so we'll have to test that.
Few govt IT project have completed on time, or on budget. Just take the fiascos with DWP, CSA, NHS, and MoD computer systems. The same Quango will get the job, and screw it up again, costing the taxpayer more.
Lastly, compunction. I won't want to carry a card that costs £200 around with me for fear I lose it, and there will undoubtedly be a complete ball ache procedure to check I haven't sold my ID card to an illegal immigrant, declarations to sign, and more money to part with to get a new one, all the time I am without it being a non-person. But are they going to change the law to compel us to carry one? Neo-Nazi Police going to have the power to stop us and ask for our papers? Not in my England, sorry, we fought a war against such oppression, and if the govt want to oppress, well, they get another war. It might be fought in the courts, or it might be in the hearts and minds of the population as we start to distrust the Police and stop co-operating, but it will ruin public confidence in them, and maybe even spark a few riots.
ID cards do not so what the govt claim either. Spain has them, but it didn't prevent the Madrid bombings. It won't do much to stop illegal immigration, or from immigrants taking cash in hand jobs. It will however cement an underclass in place.
ID cards are a band aid for the complete screw up immigration has become. It won't solve a damned thing, and applying them to the rest of us won't solve anything either.
Spend the money on real Police Officers instead, and have them out on the streets. That is the real solution to preventing crime and terrorism; a visible Police Force, rather than just seeing them on match days (days when there are football matches)