This greedy system is guilty for all man's failures, they force us in their institutions, learning us what they want, paying us with their money and we buying food and other with this filthy money. At the end we are guilty when we have fantasy of normal life ..They call it Greed!
One day people will live in in better world.
Greed can make our lives crumble, as you say that this is the worst thing. Without any control over the emotions then the greed will continue to occur. So doing exercises to deal with a bad situation with calm can make us better to think positively.
I do not think we should exercise to be able to control our greed. The cause of greed is because we always want more, we always feel what we get is not enough. So if we can be grateful for what we get and do not expect too much, we will not be too greedy and it will be easier to control it.
I don't think there is a way to control greed. Unless you use a tight regiment. You need to limit your spend and follow a disoplined plan where you make bets of a certain size and stop after a certain time if you have no plan and limit you will bet wildly untill you hit 0. The amount that you win could hit your goal and then you stop. Without a goal you will never stop.
I think maybe what I call it is still a way to control greed, but it takes patience. I also agree with your way. And I think if the two ways we are combined, it will be more effective, much more effective.
Greed is an insatiable hunger and I think this is just a part of "being human". We had it in us somewhere deep down below. What are guys talking about? Spending money to the things you wanted to buy from what you earned is just normal. I'm not saying that all people should be or are materialistic, the point is, do what you want to do with your money, its yours.
Now, on how to control to spend your money is to set a limit for yourself. Have a list, and in that list, list down all the items that are NECESSARY and UNNECESSARY. That's how you control your "Greed" in spending money.
Now, concerning gambling, in my opinion gambling is not a good way to spend your money, just a blink of an eye its doubled and another blink, its gone, that's what gambling is. This will concern your decision making strategies and guts. There's no such thing as "Luck", its just that, it is what it is. Now if you really can't stop on gambling then, be serious about it, and what I mean about serious is, read things, be observant and learn from your experiences.