Abstract. The process by which individuals lose their psychological defences against normalizing corruption is known as cognitive immunity failure. The representation of corruption as inevitable, unchangeable, and self-reinforcing amplifies fatalistic narratives in algorithmically curated environments that are shaped by filter bubbles and echo chambers. By shifting reactions from initial outrage to numb indifference, these patterns weaken moral salience. Echo chambers repetitively assert fatalism through content alignment and repetition. At the same time, from a neuroeconomic perspective, the cost-benefit analysis shifts toward disengagement as repeated exposure devalues moral action, lowering the perceived expected reward of ethical engagement. This study examines how these dynamics, which are based on decision-value models, motivational fatigue, and social norms, reinforce one another and erode civic vigilance. We conclude by outlining three intervention frameworks: public education to restore cognitive immunity, norm-restoring campaigns that restore moral urgency, and AI design that combats narrative fatalism.

Keywords: cognitive immunity failure, moral salience decay, corruption perception, neuroeconomic decision making, AI-mediated content environments.