The only observable benefit to maintaining a high population that is immediately directed into the labor industry, is the functionality of currency exchange and stock markets that are exclusively beneficial to the highest financial class, as these markets provide profitable outlets that cannot be compared to more strenuous labor or financial reciprocations for such labor.
Generations of humans are physically, psychologically, and spiritually sacrificed through existential dissatisfaction associated with financial insecurity as the highest class ordinates constant exclusivity above those who uphold the analogs of the labor industry that support the highest markets.
Without an influx of obedient laborers in these departments, members of the highest financial class would experience an increased urgency to participate in such analogs of labor themselves in order to preserve the markets their financial security relies on. The involvement in such labor would render the markets less useful, as they are leaned on for less strenuous financial acquisition.