I’m not an expert at all, but I think I know how to answer your question in the somewhat mathy terms you’ve framed your it in. I think the main argument is to get rid of a bi- (or multi-) modal distribution and move to a unimodal normal distribution that’s taller and narrower. That way you wouldn’t have a few people with tons of money while most people have no money. You’d instead of a lot of people who mostly have comparable spending power.