> If the goal is to reduce poverty, the number of billionaire is actually irelevant. How you fund reducing poverty might influence the number of billionaires, but, for me it is more important what each society does for the poor, rather than counting how many are billionaires today.

You're so close. The only missing connection is the realization that billionaires exercise outsize influence, and will affect government policy to help themselves, not the poor. The only way for the poor to not have their voice silenced by the rich is to reduce the rich.