The wealthy are much better off though. If you looked at the wage increase of the top 1%, if has risen by $800,000 a year (https://www.commondreams.org/news/2019/12/09/staggering-new-data-shows-income-top-1-has-grown-100-times-faster-bottom-50-1970) since 1970.
So capitalism is working exactly the way it is supposed to. Exploiting the middle and lower classes for the rich. This is exactly the progress they want.
I would say in capitalism “middle class” however you define it is something that is not ideal to have. Rich will be employers who underpay poor people 50 cents a day or less (speaking in fully open market without state intervention on minimum wage and other basic needs) poor won’t have enough resources to fight for their right and will just pray to live to see better future or just die. Middle class is basically only ones who will have enough resources to fight but not have enough to be enslave other that’s why they are problem in state with pure open market and pure capitalism.
My definition of middle class is someone who has enough money to live somewhat peaceful life but don’t have enough money to call themselves rich.
Much more than that. The richest men in the country doubled their net worth this year alone.
Progress? … don’t you mean maintaining the status quo of human inequality for the past 10,000 years?