I ran a quick search for articles or data to support pg's idea but couldn't find any. I'm wondering if, on average, "rich" and "poor" people have a similar amo

I ran a quick search for articles or data to support pg's idea but couldn't find any. I'm wondering if, on average, "rich" and "poor" people have a similar amount of stuff/junk, but the rich have higher-quality junk and more room to spread it out so it looks cleaner or more minimalist.