I would agree that do-ing is a major component of the delta, along with ability and a fair bit of luck. I guess my mental model would be that someone's socioeco

I would agree that do-ing is a major component of the delta, along with ability and a fair bit of luck. I guess my mental model would be that someone's socioeconomic status often comes down to: starting point + (hard work * ability * luck) (where any one of those may be positive or negative)