Learning and growth occur towards tribalism all the time. Rich people still freak out when other rich people face consequences. Since they can't relate to the problems of the lower class they lose empathy over time. They turn to other well-off people because they can relate. Under capitalism having less empathy makes it easier to accrue wealth. So that's likely to be more common.

The very plasticity of our brain is susceptible to the disease of wealth. They don't need to always have been bad to explain it. Unexamined maybe but everyone's brain is learning all the time.