The key issue is not the system or the technology, but who controls and implements it. I'm told its the equivalent of a chest x ray. *Edit* It's far more complicated than that I hope you're aware of the details required to implement what you're saying here. The value system, the environment, education, access to resources, and levels of self awareness of the people implementing the system all play a crucial factor. It's a lost cause trying to stop a tidal wave. It's a better strategy to get a surfboard.