Society has been structured so that increasingly few people accumulate most of the wealth. To many, it has reached a degree that is unethical, unjust, unkind, particularly because those who are not along the privileged are suffering as a result, therefore the scale of human suffering increases over time, while wealth concentration continues to increase. You may not agree that the degree of wealth disparity is worthy of such descriptions yet, but that is just a matter of where to draw the line, not whether it is an understandable thing to draw a line on. After all, if in say a few hundred years, unrealistically and strictly as a thought experiment, the current system has lead to a single individual accumulating as much wealth as every other individual in the world combined, and having done so in an above board way, while every other person in the world lives in abject poverty, would this be unfair to you? If so, then we only disagree about the degree of wealth inequity that informs our belief on the fairness of our economic and societal systems.