It is a money cycle, you spend it, and in another way, you will get it back. However, the poor remain poor, and the rich become richer. If this cycle really worked, it would balance status, and there would be no poor or rich. Instead, the poor are just a point or the support of the rich, where they can take the benefits. They lose money in the house, but the money they receive from the government in the tax sector is very minimal. They lose more and receive less, while the extra money is consumed by the rich, and they become stronger.
It is pretty obvious to me that when we talk about money and it's cycle then we are not talking about a closed cycle, when it gets all back to the hands of those who worked to get it, it is a open cycle or a lineal one, in which it exists an important accumulation of wealth by those who are in businesses, and it makes sense if you think about it. Nobody opens their own casino to lose money and nobody risks their capital to set up a betting book to lose money either. As long as profitability is guaranteed, then there must be some chance by those businesses to accumulate.
All gets darker and more corrupt when those in charge of a casino are directly involved in the way taxes are collected and how the government spends it's money on the people.
That is why there is a big interest in lobbies and companies influencing over governments and even local administrations, gambling is not the exception. If you country is corrupt enough, some governor or senate member could have their own casino being run by a front person.