Capitalism basically.
Sleazy Wall Street bankers are synonymous with strippers and high class hookers for a reason. They are not hesitant to spend like $7000 for an hr with agency WLs.
The case with Singapore is interesting. They have their own casino. Actually more than one. For a tiny city state it's impressive or indulgent whichever way you want to look into it. If you look into oligarchs of Singapore, the first generation of them actually were pioneers of a kind. Whether in banking, real estate, food industry etc. When it comes down to present, alot are second or third gen managing or inheriting the family empire.
I know one of one, not close friends, but anyway his dad owned a diverse business including Plantation in Costa Rica at one point. His business kinda went into hard times and on verge of collapse during Asian financial crisis but Chinese mainland money bailed him out as they wanted part of his raw material business. It was fortunately for him before the current cold war by US and coincidentally during the "go out and invest" campaign in China when they were was flushed with cash and they encouraged Chinese state and private companies to invest abroad, anyway long story short, his dad company was saved and even though the family now only holds minority share, it prevented bankruptcy and was enough to start another round of investment and rebirth. He nows live comfortable life and was rumored privately but not confirmed, had cheated his wife with young models and miss Singapore contestants.