1. Nothing says it has to be this way, and taking the big picture of history in perspective, it definitely is not that way.
2. Inequality comes in many forms. Corporate and financial culture in Europe pretty much says that you are only allowed to be an entrepreneur if you are born in the right (i.e. rich) family. It is a much smaller club. The European corporate culture is also one with a much stronger hierarchy between the workers, the managers and the executives. In Europe, university degrees and other forms of bureaucracy further inhibit career progress. Glass ceilings are much, more prevalent everywhere, many of which would be illegal in the US. The salaries are lower and the taxes much higher. All of these are also forms of inequality. This talk that compares the beggar on the streets with Elon Musk is a bit myopic.