In the excerpt from Margaret Atwood's "MaddAddam," the essence of why bad people engage in harmful actions is linked to their pursuit of money. They perceive money as an ally that supports their endeavors, mistakenly believing it to be a more useful resource than genuine loyalty or moral integrity. This misguided belief drives their actions and decisions.

However, the narrative reveals a crucial truth: money is unreliable, often disappearing exactly when one needs it. In contrast, loyalty – represented by the term "Fuck" in this context – remains steadfast. The text underscores the difference between the transient nature of wealth and the enduring value of loyalty, indicating that relying solely on money can lead to misguided priorities and ultimately negative consequences.