Yeah, if the whole world consisted of the US and the UK perhaps...

Bring this up again when the following countries get onboard with our biometric scheme:

China
India
Egypt
Iran
Singapore

You know, the thing is, we ALREADY HAVE a world id. It's called a passport. Anyone with a photo and $75 can get one from the state department. In every foreign country I've been to, they've all recognized it as a valid form of identification.