Banker's Paradox
From Wiki
The Bankers Paradox:
The evolutionary psychologists John Tooby and Leda Cosmides call this the Banker’s Paradox, and they apply it to a deeper evolutionary problem: to whom should we extend our friendship? The Banker’s Paradox, they suggest, “is analogous to a serious adaptive problem faced by our hominid ancestors: exactly when an ancestral hunter-gatherer is in most dire need of assistance, she becomes a bad ‘credit risk’ and, for this reason, is less attractive as a potential recipient of assistance.”
This social blind spot (effect) was brought to my attention in skeptic Michael Shermer's book The Mind of the Market.