I think its symbolising mans ludicrous growth consumption,
This is an example of how your perspective helps frame what you interpret in the environment around you.
From my perspective, it could be one of the following:
a) a commentary on poverty in general forcing people to sacrifice their long term opportunities to get by day to day, or,
b) the guy got to "the top of the ladder" and didn't like what he saw (grass really wasn't greener?) and stayed with what he knew.
Much like beauty being in the eye of the beholder, art is subjective to those beholding it.