As Britain lurches towards ID card culture, the arguments over whether this is the right way to go are far from won.
For a start, a massive question mark remains over how it will all be funded, as is being further underlined today.
Ministers anticipate the public will dutifully fork out the £30 expected cost of the card when the time comes without complaint. But the Government's own expert on the scheme suggests this won't work. Sir James Crosby says they should be issued free of charge in order to win over "hearts and minds".
What Sir James is warning, in effect, is that ministers may well have a fight on their hands.
History tells us there are dangers in rushing ahead with ill-thought out plans without the backing of the public. You only have to look as far as the last Prime Minister whose latter years in office were dogged by a loss of faith due to his headlong rush to war with Iraq.
Further back, Tory Prime Minister Margaret Thatcher never really recovered from mass riots on the streets of London after the introduction of the Poll Tax - a policy on which she eventually had to U-turn.
The introduction of ID cards has all the hallmarks of delivering a similar catastrophe.
Suggestions by Home Secretary Jacqui Smith that young people should be among the first to enrol because they are likely to be more open to the scheme are farcical.
Presumably Ms Smith has not talked to many students recently or visited a student union meeting.
ID cards represent a massive social shift in this country. There are legitimate reasons for their introduction in terms of national security, but many regard it as an infringement too far.
These arguments need to be won. We need to be convinced the system will work and not end in disaster. And we need to be confident the cost has been properly thought through.