This is really weird because my dad had an uncle who made a fortune in the Philippines and he was very close with LDS leadership. I wouldn't be at all surprised if he played a major role in opening the missionary program there. We used to go to a big Christmas celebration at his house every year when I was young. But their family did not own casinos (or at least, they never said anything about it if they did).
I wouldn't expect them to brag about it exactly. It was in the 1970s. I heard about it from folks around.
lived in Tooele stateside, had a better house in Davao I think, another in Manila. Showed up for missionary reunions even.