Apply the scientifc method. Look at places and times with wide economic disparity. Were/are those good stable places with happy healthy populations, or was it bad. If you decide it’s a problem based on evidence, then look at solutions. If you don’t have examples, try things out and record the data. What worked and what didn’t. Don’t let your values bias you. I think that welath inequality is a problem, but I’m willing to listen to thoroughly researched, peer reviewed, data backed conclusions.