Is Inequality Bad for Gross?

There was almost no middle class, or the 90 % of the weldh would belong to the top ten%. There's very little evidence for his claim. So inequality in or above a certain countis just not not useful any more. We don't want to return to this kind of extreme form of inequality. I think at some inat some abstract philosophical level, everybody agrees that inequality is acceptable as long as it is in the common interest.