The list author says: "With all the stuff happening in the world right now, I think it makes sense to have some basic items on hand as insurance in the event that a major catastrophe hits. Look at the earthquake in Japan as a good way to prepare."
"In catastrophes, people get hurt. If I get hurt, then I can't expect to be able to walk into an emergency room. So a basic Medical kit has to be with me at all times. Be sure to bring your prescription medication with you!"
"This is one of those "if money is no object" additions. Clean, potable water is crucial, and this filter means I can ultimately drink almost water I find. So, it makes sense to have in the event of a major catastrophe."