Greed is a bottomless pit which exhausts the person in an endless effort to satisfy the need without ever reaching satisfaction.
Where do the evils like corruption arise from? It comes from the never-ending greed. The fight for corruption-free ethical society will have to be fought against this greed and replace it with 'what can I give' spirit.
Anyway, no drug, not even alcohol, causes the fundamental ills of society. If we're looking for the source of our troubles, we shouldn't test people for drugs, we should test them for stupidity, ignorance, greed and love of power.
There are a lot of people who are doing wonderful things, quietly, with no motive of greed, or hostility toward other people, or delusions of superiority.
All religion, my friend, is simply evolved out of fraud, fear, greed, imagination, and poetry.
The everyday kindness of the back roads more than makes up for the acts of greed in the headlines.