Yeah it can come from a background of abundance but does not mean it is not a good attitude to have. I have spent most of my life with an attitude of scarcity and I was jealous of others. It held me back in so many ways and made me unhappy. Now I try to live with positive outlook on the future and try to make things happen with a belief that things will work out some how in the end. Impoverised people could benefit from some of this thinking (balanced with realism) since it could help improve their circumstance.