The whole identification problem is going to have to be addressed sooner or later, especially since it will eventually be possible to vote in elections from your computer.
ssh combined with username/password should work fine for that, or something a tad more graphical perhaps. Voting safety problems have already found solutions. It's more a matter of choosing a solution than finding one. :)
Then the only argument will be about the government using the iris scans to locate people without their consent. You will need to have an iris scan to get on an airplane, get into a court room, stopped for a traffic violation, etc.
I agree that this technology _could_ be used for such purposes, but I doubt it will. Consumer acceptance is also needed for this, and I doubt they will accept this type of privacy intrusion. Acceptance of DRM might be a different matter of course, and will depend greatly on the restrictions placed on it. The public has removed DRM driven solutions from the marketplace before after all. What frightens me about this 'solution' is that it seems to be accepted by so many technology companies, and it may be supported by legislation banning all other technologies. Luckily there's also a mounting support for alternative legislation and solutions. There may be hope still...
You know this is coming. I was just watching a news broadcast, about people implanting "locater chips" in their children to protect them from kidnapping, but that is getting way OT.
This is a tad extreme perhaps, though the button transmitters seem a tad more popular than implants. This way the children decide if they wish to be located. Regards, Pieter