The fact that you can confirm someone's identity and confirm that they've never previously done something like crash a plane into a building is no guarantee that they'll never decide to do something like that. Proving someone is who they say they are does nothing to determine that they haven't decided to blow something up just for kicks.
Brill's identity based system is about nothing more than enhancing the ways we can make a two-tiered society. And it's fucking ridiculous.