Their homes are bigger. They own more cars. They feel more affluent. In a segmented nation, they have built lifestyle niches for themselves where they feel optimistic and fulfilled.
I believe he thinks A + B = C here, but how could he know that? Isn't it just as likely that people have bigger homes and more cars and are now incredibly stressed out about how they keep those things? Or couldn't they have them and be wondering why their bigger houses and extra cars aren't the ultimate answer to happiness?
Or maybe he does have his finger on the pulse of the nation, and that is how shallow we have become. I hope not.