This thread is very important to the discussion, because it highlights an apparent opposite mindset of the article. As I posted elsewhere in this thread alread

This thread is very important to the discussion, because it highlights an apparent opposite mindset of the article. As I posted elsewhere in this thread already, I think the real issue is that the ideas of Robert Frank are not about these "regular" cases in the middle income range at all. (At most, I'd conclude that the interviewer asked questions that would touch persons in that range, too, and who likely form the majority of the site's readers.) If you are doing OK-ish on the upper end or OK-ish on the lower end of the middle income strata of a Western (!) society, your "lot" should be quite tolerable. And nobody would deny that with extremely hard work and discipline you can move from the lower end of middle income to the upper end of middle income. However, if you are doing really bad and are below the poverty line or really well and are in the top 1% range, that certainly requires a good portion of (possibly: bad) luck. It already starts at conception, with your "birth rights". And the aim of the article (or rather, of Mr. Frank's theories), as I interpret it (them), is pointing that out that we need to find measures how to smooth those extremes, not about figuring out if some middle income person had a bit more or less luck, or if it even mattered.