I believe a national ID card system is a good thing and only those with something to hide need fear it.
What an odd thing to say. Why do you imply that "having something to hide" is suspicious in itself?
I prefer not to have strangers poking around in my life - there are aspects of my life I want to hide from the state. In short, I value my privacy. There have been lots of words for people who find that suspicious - the East Germans used to call them the Stasi.
The assumption that "having something to hide" is sinister is very foreign to traditional British values. I don't want to live in a country where preserving one's privacy is considered a suspicious activity