Also same as what has been said I agree that no politician will disclose about their participation on a gambling business since it can possibly ruin their reputation.
In third-world countries, reputation can be bought with money. I don't think any member of parliament has a good reputation in my country. Everyone fears them because they control the laws in this country. They can do whatever they want, and no one has the ability to speak against their corruption. Gambling is banned here, but they do own some casinos because they have power.
They are the lawmakers and the ones who break it most for their benefit. But we, general people, just watch them looting the entire economy.