Estona, a country of 10m and virtually no IT infrastructure to speak of pre ID cards
About as close to an IT "Green field" site as you can get.
Former UK Home Secretary Clarke's favorite ID card example.
Yes, it's all in the details of how that system is implemented. .
The real question is do you trust your government? Because you're going to have to.
And do you trust the next one after that? And the next?