Why do we need to know the flow of campaign funds?

An'im Falachuddin Mahrus
Members of the Indonesian House of Representatives for the period 2014–2019
H. An'im Falachuddin Mahrus (born June 6, 1964) is an Indonesian politician who served as a member of the DPR-RI for two terms (2014–2019 and 2019–2024). He represents the electoral district of East Java VI, which includes Blitar Regency, Kediri Regency, Tulungagung Regency, Blitar City, and Kediri City. An'im is a cadre of the National Awakening Party, he serves on the Commission X. Source: Wikipedia