Some people may be mainly stingy others mainly greedy. Some however are both greedy and stingy, depending on the current situation. Any of the two diseases causes great emotional stress on the entire society. Such stress again can be overwhelming and create situations totally out of control. Hence if Love is kept from flowing in its original and purest Divine state as made by God and received from God by all souls - then it needs to be modified to any other kind of energy.
Energy always needs to freely flow.
Any restriction to such flow requires energy on its own just to reduce, or change the natural flow of Love - from soul to soul. Love that is stopped from flowing as Divine Love to another soul may need to be transformed into purely causal, astral or physical activities. Such Love also can turn easily into anger, hate, revenge or violence. Love is powerful and any soul strives to Love as much as possible. Mankind's mind - even in its Divine state of the soul can modify the flow of Love any time.