To be a coauthor on a preprint that you have not submitted, you have to actively "claim" it (using a password given to the author who submitted). It's on you to double-check before claiming.
I don't think they mention it in the CoC, but anyone can upload an ArXiv preprint listing literally anybody else as a coauthor, so it is only logical that only "confirmed" coauthors should be affected.
This is a Keynesian argument, which has largely been disproved. Keynes famously said if you just paid people to dig holes and fill them back up again, that this would be net stimulative to the government. It works until it doesn't work, because digging holes, as you can reason from common sense, does not actually create value.
This U.S. operation is meant to bomb the Iranians into the Stone Age, so presumably THAAD-level air defense wouldn't be needed again. The Qataris, Saudis would have sold off to South Korea, Taiwan if they wanted.