[updated--published too fast] The recorded conversations could be transcribed into a database that could be matched against public information.
The bottomline is that as the bureaucracy kicks into gear with the provision of emergency help: grants, loans, shelter, whatever, the processing center can read the ID bracelet and match the person to the data in the database. This has many benefits:
- Finding lost children and reuniting families--because everyone is in the database with some sort of identification (even if only 1-year infant found near X), people could be speedily reunited. That would save much effort and more emotional strain.
- Avoiding fraud--while there could still be fraud it would remove the biggest causes of abuse in Katrina.
- Providing information--you'd have a much faster flow of more accurate information as to the extent of the disaster and its impact. That means much better management of relief efforts.