I don’t think you can think of it as some sort of logical plan. It’s a bug, not a feature, of capitalism. What you are describing is the inevitable end of a completely free market with no regulation. The strong (economically) keep taking from the weak until we have the situation you are describing. From there the next step is dependent upon whether the weak form a cohesive identity and seize power (revolution) or stay fractured around smaller identity cleavages (race, religion, gender, etc) and are subjugated.