The greatest philosophers are rarely the wealthiest people. Wealth generally comes from being presented with opportunities, putting in the work to make the most of those opportunities, and being lucky enough that they end up being good. Intelligence can be an asset here, but bigger assets are knowing people already in positions of power, already having resources you can leverage, and being willing sacrifice years of your life in pursuit of wealth. Those factors don't require you to be well reasoned, logical, or intelligent.