Exactly. Gambling isn't legal everywhere. Some countries legalized it, while some other countries even forbid Gambling and forget about opening a casino. Yet, some politicians may own local casinos. Even if it is forbidden, politicians may own their casinos secretly. As you may know, Gambling is banned in my country, but law enforcement agencies found some casinos in elite areas.

Mostly, the political leaders live in that area, and the casinos have been there for a long time. It is believed that all those local people knew about that casinos. Since some political leaders were sheltering them, no one ever dared to report about it.