Based on political trends, I believe that basically every Western nation will have a national ID card system within 10 years. Certain nations are waiting for an opportune moment to announce these card plans for national IDs they have been wanting implement for years now-a domestic terrorist attack would provide more than enough political capital to get things done.
Governments just see too many benefits to not introduce them. Governments realise they have lost so much power relative to the power of the individual over the last few decades-and we are now paying the price in terms of too many unregistered individuals (illegals), the ability of people to steal identities (and their finances), and the ability of known criminals and terrorists to move between jurisdictions with ease. Governments also feel there are also too many domestic predators out there too that we would all benefit from knowing where they are and what they are up to.
Of course, people often have to carry some form of ID such as a drivers license, or maybe a passport, but governments feel they need more now. In some places, especially places like England, Australia or some other welfare state in say, Western Europe, cards will be brought in under the political auspices of a 'benefits' or 'entitlements' card, which will have to have identifying information to make sure you get your 'entitlements'. (In these places, the economic reach of the state touches basically everyone at some level).
Who is going to say 'no' to that?

On advocacy for such a scheme: I think it it would be fine if this was introduced in Australia, along with any other form of government ID system.
(I've got nothing to hide, and neither have any of the FG here, whose daily lives would not be affected in the least. I don't think you guys are criminals or are threats to the state or anyone else. And you're not likely to become so in the future-you don't have the time for starters.

This is not about political control. It is about barely noticed surveillance upon individuals known to pose a potential threat to others within the society that they live in. Just how policing works now, but with better technology as a tool.
PS: We also all live in nations where the setting up of ID systems would be regulated and watched by other independent bodies to ensure the interest of individuals is protected).