It's still very irrational no matter who pays. The article is looking at a society-wide wealth here isn't it?

I mean a party? Thousands and thousands of dollars for just one day?

I did the irrational thing, paid a lot for my wedding and it was really special. My family is much closer to her family because of it. From me and my wife's rational self-interested perspective, it makes no sense: we would be in a better position financially had we not splurged a little for the wedding. Our house could be bigger. We could have more optimally allocated our capital.

However, the family bonds being strong outweighs all of that. When we zoom out a little bit and look at our extended family and friend group, it all makes sense. These are the people who will help raise our kids, take care of us when we are down on our luck, etc. The 50 people who attended can, because of our big expensive wedding, put faces to each others' names. It was a fun party for us, but it actually served a very important purpose. This value will not be registered in the GDP number.

I'm poking fun at the article. That first of all, we (the enlightened, modern, etc) spend an absolute metric fuckton ton of money on irrational meaningless shit, due to social pressure. I would point the author of the article to homeopathic medicine, which is a 10b market; just ten of these equals the GDP of Ghana. Do a ctrl-f for colonialism or imperialism or extraction and... yeah, sure. They must be poor because they do quirky things at funerals.