Can confirm, grandpa was a WW2 vet (+ a few of the postcolonial wars that followed). He used to say that soldiers morale hinges on wine and cigarettes.
Also he died of lung cancer after surviving all that shit, including being a POW for 4+ years in extremely shitty conditions in Cambodia
I keep joking that we should make video games mandatory for millionaires when this subject comes up but I legit think that playing some grindy game or management games would make this type of people less greedy to some degree, because at their core they appeal to our seemingly primal urge of always hoarding more resources.