It doesn't directly, except to the extent that:
* Returns on investment capital tend mathematically to ensure the rich get richer
* Disparities between wealthy and poor people create resentment and tension
* Resources enable the wealthy to opt out of communities, creating an adverse selection condition that starves those communities
* The role of the finance industry in this story tends to intersect directly with poorer communities in predatory ways (see: subprime housing loans)
* The finance industry is intricately connected to most of the other mechanisms families have for obtaining and reinvesting wealth, so it can be difficult to ethically insulate oneself from it
There are ways in which wealth also creates opportunities and benefits across all classes that to some extent mitigate:
* They're an engine for investment into technology, which has product lifecycles that move so quickly that less wealthy people rapidly get access to new technology
* They create classes of jobs (see: Park Slope nannies, or the tool & die people who work on Gulfstreams for another cartoonish example) that would not otherwise exist.
&c.
(FWIW: net-net, I think we need more redistribution, and that we tilted too sharply away from Reagan-era high taxes at exactly the point at which changes in productivity made that shift most harmful. I'm making what I hope are descriptive, and not positive, points).