Answer:
Literary devices are various techniques used in writing to help you express yourself and your ideas in a slightly more creative way, making your writing and world stand out on page.
Step-by-step explanation:
The literary device used here is aphorism.
An aphorism is a brief saying or phrase that expresses an opinion or makes a statement of wisdom.
It connects to the theme in that it tells of how the economics are swaying, in today's world, things are much better the rich are getting richer, the poor are still getting poorer.