Let's throw out the subjectivity of the idea of "working" for a moment.
Even in that case, arguing whether capitalism works or doesn't work is like arguing whether a neighborhood works or doesn't work.
Subjectively speaking, employers and employees make the economy go around. As part of a team, everyone should bask in the sun so to speak, not just an elite few.
Neighborhoods can't work or not work, because a neighborhood is simply a collection of homes in a particular vicinity.
Any argument of a neighborhood working or not working would presuppose the acceptance of some goal that is specific only to the individual creating the goal.
This world is built around self interest. Although an individual or individuals lead a neighborhood, the neighborhood as a whole should benefit as all the residents of the said neighborhood play a vital part in its overall function. Whether it be detouring graffiti vandals, break-ins, etc., the neighborhood as a whole benefits. This is a hypothetical analysis obviously. Every company needs a chief. Some are just meant to be indians.
Capitalism is simply the description of an economic system. Capitalism doesn't exist to make people rich anymore than it exists to redistribute wealth or promote economic equality.
Any goal attributed to capitalism is done by the individual and not by the nature of capitalism.
Capitalism itself seeks to do nothing
Capitalism allows these rap artists on this very site to create businesses and sell music. It allows private entities to keep their profits. It is the dream of many who come here. Although we are not a perfect society, the opportunity here in the United States to be successful is available to everyone.
I think what you are getting at is all agenda's etc. revolve around self interest. I say think because I am not sure what exactly it is you are trying to get across.