Social inequality was a result of 19th century capitalism, today, in prosperous countries, we live in 21st century capitalism married to liberal democracy.
So today social inequality is being replaced by psychological inequality.
So rather than having social class, we are having psychoclass.
So the questions we should be asking are: what determines psychoclass, and what is psychoclass, and to what psychoclass do I belong?
And it seems that on a site like Typology Central devoted to psychology, we can ask these important questions.