Why do rich people lie, cheat and steal more than those on low incomes?
thejournal.ie
thejournal.ie
This seems like the kind of result that would be tough to reproduce. This test result is ideologically satisfying and sensational - "The rich are evil, we knew it." The null result, "People realize it when they are massively advantaged in an unfair game" seems unpublishable.
I googled the study and the name of the author with the word "replication". It seems like at least some of the author's research on this subject area, though I can't tell if this is the same Monopoly experiment or not, failed to replicate.
But if you have any soul you'll be miserable.
Read Tolstoy's Confession.
It's short.
The key takeaway: Money => Increased independence from others => Prioritising self-interest over everything else.
Because a financial fine with no serious criminal penalties behind it is barely noticed by the highly wealthy. A $550 traffic/moving violation and the associated increased car insurance premiums associated with it means two very different things if your annual income is $55,000 or $600,000.