Quite apart from the whole civil liberties part of the database and so on, it\’s clear that it simply won\’t actually work.
In fact you might sense that the whole field of biometrics and ID is rather like medical quackery: as usual, on the one hand we have snake oil salesmen promising the earth, and on the other a bunch of humanities graduates who don’t understand technology, science or even human behaviour. Buying it. Bigging it up. Thinking it’s a magic wand.