You're probably right that it doesn't come from Catholicism, but it still can be based on it. I.e. be explained by it, used as a motivation for the said behavio

You're probably right that it doesn't come from Catholicism, but it still can be based on it. I.e. be explained by it, used as a motivation for the said behaviour. Religions are quite malleable, Christianity (in general) is no different. Full of contradictions that open the possibilities of quite different interpretations by emphasizing one or the other of the contradicting pieces of informations. So while what you say sounds right, at the same time Jesus talked a lot about social justice and how one should help the poor and also, famously how the rich man has less of a chance to get to the kingdom of god than a camel to go through the eye of a needle. (Which, AFAIK, he said to a rich men when he was reluctant to give away his wealth to the poor in a bet to live a life that leads him to the heaven.)