A designer is first and foremost a human being.
Before you are a designer, you are a human being. Like every other human being on the planet, you are part of the social contract. We share a planet. By choosing to be a designer you are choosing to impact the people who come in contact with your work, you can either help or hurt them with your actions. The effect of what you put into the fabric of society should always be a key consideration in your work.
Every human being on this planet is obligated to do our best to leave this planet in better shape than we found it. Designers don’t get to opt out.
When you do work that depends on a need for income disparity or class distinctions to succeed you are failing your job as a citizen, and therefore as a designer.