Are go bags really just about saving money?
First and foremost, go bags, as a concept, are a long-standing practice in disaster preparedness. You will not find a government sponsored plan that does not include them. Of course, important documents don't include bibles, rather they mean things like your ID cards, cash, anything that can verify your identity and get you up and running somewhere else if needed.
Regardless, I noticed that JWs only really started speaking about go bags and general disaster preparedness after Hurricane Katrina. The very first mention that I found was in 2006, approximately one year after that event.
Obviously this was not the first natural disaster, or war, that occurred on the Earth. However, it was a big event in the US. I do recall the branch singing its own praises at the time with claims like JWs being the first there and supposedly providing relief for non witnesses as well.
Since then, however, they've tried to link go bags with respect for Jehovah, and credit themselves with all disaster preparedness plans in existence, even though their ideas are all copied from the government or other public interest groups.
I can't help but wonder then, if this really boils down to money for the branch. After all, if there was a real concern for pimis, they would provide a go bag for all publishers. They would also likely build kingdom halls in such a way that they can be used as shelters depending on the emergency. But they don't do any of that.
However, it does not escape my notice that the more readily pimis leave (instead of ignoring government warnings and suggestions) the more the branch saves. After all, they won't have to waste resources pretending to help people.