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

From Hidayat Nur
Member of the Indonesian House of Representatives, Commission II 2019–2024
Aus Hidayat Nur (born July 20, 1961) is an Indonesian teacher and politician. He currently serves as a Member of DPR-RI since 2018, replacing Hadi Mulyadi who ran for the position of Vice Governor of East Kalimantan. He represents the electoral district of East Kalimantan. Aus is a cadre of Justice and Prosperity Party and sits in Commission II. He previously served as a Member of DPR-RI from 2009 to 2014. Source: Wikipedia