Earlier quoted context omitted.
You're right, but we've never devised any system that prevents this from happening. Every single organization leads to a concentration of wealth and power. And even those ideally conceived to have counterbalancing forces, eventually are corrupted and subverted. It seems to be the steady state of reality.
This will be the reality until we come up with a way to make good decisions using direct democracy, and make that decision-making process so fast and easy that it can be used for any kind of group decision. Concentration of power stems from our inability to make good decisions as a group of equals. We have to choose someone to make decisions for the group because there is currently no other working way to make them.…
The 51% voters are just another self-interested power center that will favor themselves and extract resources from the 49%. Not to mention that the system can be corrupted at every point. For instance, you still need police and military to enforce the results of group decisions; and at any moment they can seize power and take control, unless they're placated with preferential treatment by the system - reinventing systemic hierarchy.
There is no system that is immune to human corruption. And all the high-minded belief in the human spirit, and the good-will of democracy, falls flat with even a cursory examination of previous attempts.