The Nigerian National Assembly faces mounting criticism over a recurring pattern of high-profile, resource-intensive investigations that frequently fail to yield concrete results, prosecutions, or policy reforms. Despite launching numerous inquiries into issues ranging from crude oil theft—allegedly costing the country over $300 billion—to multi-trillion naira discrepancies in NNPCL audited accounts, many probes remain inconclusive or lose momentum as legislative sessions expire. Analysts argue that this cycle of abandoned investigations undermines institutional accountability, weakens public confidence in anti-corruption efforts, and allows financial leakages to persist unchecked. While lawmakers often cite constitutional limitations regarding prosecution, experts point to a lack of follow-through and enforcement as primary drivers for the diminishing effectiveness of parliamentary oversight.