The most common type of gambling addiction is the one with greediness. That is why the addicted person will be losing huge amount of money to the extent they may not have money again but start to borrow.
But addiction can also be that the gambler is not really wasting money on gambling but gambling is really taking his time. But this type of addiction is mostly not possible.
Most addicted gamblers are greedy.
Greediness->Gambling addiction, I think that could have been the process all along for those who are into addiction. And so it's a vicious for them, maybe they could have started small and gradually becoming addicted because maybe they lose more or win big. And I would agree for those who says that both elements are present in any addicted gambler, as I have said, the impact of winning and losing? It might create a "motivation" to continue to gamble, hence you lose your control. They might not see it as just wasting money, but as avenue for them to get rich. So there is a big correlation between a addicted gamble and greed.