That’s just not possible when you factor in both accumulation of wealth (it’s exponential like compound interest) and the competition between capitalists for profit. The competition does not come from their moral beliefs but from the incentives created by the system itself.

All that takes is preventing those without a personal concept of “enough” from controlling capital.

This would require to remove capital from the hands of individuals and either throw it in the hands of the state, or change its (corporate) ownership to co-op model (one worker - one vote). Both have been shown to work but that would no longer be capitalism but instead a form of socialism, as private capital would no longer dictate what’s produced in the economy and how it’s distributed. Instead it would be dictated by the state which is controlled by the people through some form of democracy, or democratically by the workers within each corporation, or both. In both cases what’s produced is dictated by the needs of the majority of the workers in that state. And that’s textbook socialism.