Who are on the list of richest in the world are always powerful. They can even change anything of a country if they wish. They have the power of politics. They may be asked for advice on taking the country forward or on major policies of the country. So we can say they are the most powerful it can be directly or indirectly.
Money equals power. But there's a difference between self-accrued power and SOVEREIGNTY... don't even try to link them to any political or gubernatorial positions except they've been tutored already on that.. what you gotta understand is that - most of those countries you mentioned are already DEVELOPED countries and the rate of intolerance for over political currupt