There are no good politicians. There are only evil politicians. However, impression that they are good are the one that counts.
In order to do so, their corrupt monies are usually laundered and cleaned. Once taxes are paid on it, the money is legal. They can then say they are not corrupt. How do they do this nowadays? Fintech.
For demonstration, let us assume a ph politician typically get about 300k of corrupt money per month. He can fake a trade and transfer all the 300k into his account via an e commerce platform. He may pay a small fee and for a bit extra, the launderer can help handle his taxes on this transaction.
Wow that’s exactly what every tax paying rakyat would love to do if permitted by the government