"the people who have more deciding power decide to vote to focus on very different issues. "
I think that's becoming an ever bigger problem. The decision makers are completely disconnected from the concerns of people with low incomes. They live in different areas, go to different schools, have different entertainment and work at different workplaces.
I remember chatting with a waitress last year on a hike. She told me about reduced working hours during COVID, worries about paying rent, car insurance and health care bills. She was really close to losing everything because she had no parents or relatives she could move to. And I thought about how I personally barely noticed COVID other than a few minor inconveniences like mask wearing or reduced socializing.
I don't know how to fix this but this complete disconnect between people who are in a position to make decisions vs the people who are most affected by these decisions is pretty scary.