Time Magazine published several articles citing studies showing that the wealthy are more narcissistic and less ethical than average folks.
Wealthy Selfies: How Being Rich Increases Narcissism
Why The Rich Are Less Ethical: They See Greed as Good
The Rich are Different: More Money, Less Empathy
Contrary to popular belief, the rich give less of their income to charity than even poor people, by percentage of income. The poor are more, not less, likely to be grateful and less, not more, likely to feel entitled than the rich.
I think these articles explain a lot about our current government, which is full of narcissistic, unethical, even criminal billionaires, their wealthy donors (The Koch Brothers, the Mercers, Russian oligarchs, and others) and the apparently unlimited power they wield. Great wealth, insatiable greed and a sense of entitlement is what has allowed these people to take control of all three branches of government and gerrymander state elections. Sure, both parties are corrupt and there are rich donors on the left too (the alt-right loves to scream about George Soros), but they haven’t had nearly the influence the donors on the GOP side have had, and at least their donations are transparent — they don’t hide behind front organizations the way the Kochs or the Mercers do. We must get the money out of politics now.