That's just a naive utopian fantasy.

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.