[DenisM]

Here's my argument in favor of the system working well:

The quality of life for 99.99% of the population has increased more in the last 100 years than it did in the first 10,000 years of the human civilization. For a graphic example consider Charles Dickens *, he documented how people lived in the 19th century and it reads absolutely horrifying and unthinkable today.

Yes the rich are getting richer faster than the poor are improving their lot. However the poor's quality of life went up tremendously - housing, sanitation, hygiene, calories/nutrients, medical care, workplace safety, transportation, life expectancy, education, you name it. There is simply more wealth to go around today. Is the wealth distribution just? We can debate that **. Is the capitalist system improving lives across the board? Most certainly yes.

* or Friedrich Engels

** personally I would avoid this frame completely, but hey