Obligations/debt gets us into the old custom of jubilee, and Jesus flipping tables, and the usurer having no heart and such.
Basically comes down to hoarding.
Cultures tend towards being more egalitarian in areas where food is pretty reliably available year round, vs more hierarchical in places where it has to be stored during long periods of scarcity, or places that have big defendable concentrations of wealth such as a location with a big salmon run.
Things get dangerous where there are points of leverage for bullies to exploit.
Which could be handled if everybody else recognized bullies for what they are, instead of thinking 'oh hey this guy has all this stuff because they're cool and smart and better than me' and serving them.
And the minute one poor person agrees to turn around and hit another poor person so the rich guy gives them a treat, it's all downhill from there. We should smack the rich guy instead for making such a rude suggestion.