Well let me make the assumption that by secure you mean financially secure and thus it's a matter of who saves more between people who feel financially secure and those who don't.
I think people who feel financially secure end up saving less because to feel financially secure then you either have a very good source of income or you already have a reasonable amount of savings and as such you have the freedom to spend a little more and save a little less.
People who don't feel financially secure tend to save more because they know that anything could happen and it's always good to have a large savings to fall back to incase of any mishap.
Financially insecure people often save more until they get to the point where they feel secure after which they begin to save less and spend a little more.
I hope this helps.