You're making quite a lot of assumptions there - in particular, that the requirement would specifically be to have an ID card on your person at all times. That seems a bit questionable to me, most obviously because it's not the way it works with the most comparable current situation: Driving licenses/insurance and driving. In that case, the requirement is merely to be able to produce the said documentation in a reasonable timeframe, rather than to have it on you. To that extent, I'd say you're arguing against a strawman: You're arguing against a particular possible (and rather unrealistic) way that ID card law might hypothetically be implemented, rather than against the principle.
Compulsory carriage of the card at all times is how the system works in much of Europe.
And since most backers of ID cards claim that ID cards are acceptable because they are acceptable in Europe - this is not an unreasonable assumption.
After all, why on earth would we need a biometric ID card anyway.
Any stats on how often that happens with driving licenses? My guess is - almost never. So what makes you think it'd be any different for ID cards? Again, you're arguing against a strawman: You've set up a fantasy idea of how the system might theoretically be abused, and you're arguing against that.
Failure to carry a driving licence at all times is not a crime.
And you are not required to present your driving licence to a police officer on demand.
Regiment my life? You sure you're not using emotive language as a substitute for addressing the real issues? The state already requires probably thousands of things of you that you scarcely even think about most of the time, things like not entering private property, not stealing, filling in your tax return on time, paying your taxes and your council tax, declaring where you live so you go on the electoral register. Do you consider those to constitute unacceptable regimentation of your life?
Relatively few people ever fill out a tax return, and all of these other things are either requiring you not to commit an act (which is not the same as requiring you take an action), or are only brief interludesi n your life.
This is something that you will be required to do at all times, on pain of punishment.
But it wouldn't be for no other purpose. It would be for the purpose of making it much easier to prevent many times of fraud,
Given that fraud from fake identities is not a particularily big problem on a national scale........ and this would not protect against stolen identity fraud (since they will simply steal the card) - I'm not seeing the benefits.
and for easier detection of other types of crime, notably including illegal immigration, and for ensuring in general that public services are consumed only by the people they are intended for. Bit misleading to describe all that as 'no other purpose'!
So again, problems that are not particularily massive and/or are blown out of proportion to allow the government to scaremonger totalitarian policies.
Most public services are either difficult to commit ID fraud for (see benefits, pensions etc) because of the documentation normally used, or are available essentially to all (see NHS treatment, etc).