From the segment:

A state run health care enterprise is bureaucratic, and I think the terrorists have shown over and over again, whether it’s dealing with INS or whether it’s dealing with airport security, they’re very good at gaming the system with bureaucracies. They’re very good at getting around bureaucracies..

And if one of your guys is a jihadist, if one of your doctors is spending all the time online reading Osama bin Laden fatwas, someone’s going to notice that. But the National Health Service is more like the post office, you know there’s a lot of anonymity, it’s easy to hide in the bureaucracy.