Some people are happy with a moderate lifestyle, and some seem to need more to be happy. What causes the contrast between people needing more or less to be happy?

What do you think are some of the major influences on people that need more money and status raising-objects to make them feel better, as opposed to someone who doesn’t need as much and is ok with what some people may call unsustainable?

Of course, this is just an example. You can provide whatever detail you would like (of course I would like much detail, though).