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

Witness
Member of the Riau Provincial Parliament (PAN faction, period 2019–2024).
Ir. H. Sahidin (born July 6, 1964) is a politician from Indonesia who serves as an member of the Indonesian House of Representatives for the 2024–2029 term. He represents the electoral district of Riau II and the National Mandate Party Faction. In 1981, he was motivated to become an entrepreneur in the agricultural sector. Moreover, seeing his hometown in Petapahan as a whole has abundant natural resource potential, especially in the agriculture and plantation sectors. Therefore, he chose to continue his education at the Agricultural Technology School in Medan and graduated in 1984. Before entering the political world, he started his career at one of the plantation companies, Sinarmas Group, in 1990. While working at the company, several collaborations for garden development were successfully carried out, including those intended for the residents of Suka Maju Village, Cinta Damai, Beringin Lestari, and Kota Bangun. Source: Wikipedia