In capitalism, capital owning individuals, companies and countries gain wealth at an exponential rate, while labor producing individuals, companies and countries gain wealth at a linear rate.
In such a system, high levels of inequality is the natural state.
Yes, let's kill the golden goose that makes us rich so that other people cannot get even richer and we won't get jealous.
Developing countries also seem to be catching up. The gap between southeast Asian states that used to be tragically poor a few decades ago to western countries is clearly closing.
In such a system, high levels of inequality is the natural state.