It could be rich to rich and poor to poor. Essentially, money circulates from losers to winners, and from gamblers to casino owners. Whether or not the casino ultimately pays taxes depends on the casino.
In essence, I'm focusing on these few sentences:
Let's first talk about how the poor gives the money to the wealthy.... They allocate a huge part of their money (which isn't a lot in the first place) to gambling thinking that this would be the quick fix to their problems. This is how they give the money to the wealthy in this case the casino owners.
And sadly, this is what happens so often. They even borrow online loans to satisfy their desire to continue gambling, and this seems never-ending, leading to crime everywhere, and gambling makes it worse.