Wealth and Power are linked, but power is the goal for the wealthy, not the wealth itself. The moment the relationship of wealth and power is uncoupled, they will discard it in favor of whatever comes next in their accumulation of power.

It is incredibly naive to think that the way things currently are is the way things will be. There is significant reason to believe that after enough concentration of power, there would be no reason for them to continue to participate in traditional economics as we know them.

On the bright side, history shows us that powerful people tend to concentrate power up to the point in which they start to believe themselves as some sort of god-like being. At which point they are reliably proven they are not. The Sword of Damocles hangs above all of them.