The extra taxes paid by all will (theoretically) improve the schools, roads, military, and services. The regulations will (theoretically) decrease the risk of poisoning ground water and injuring someone, which adds even more value to the local community.
The distinction is just that the septic tank is twice as expensive in the developed country. But that money can lift people out of poverty. The exception is when the company owner is hoarding the majority of the money tax-free instead of paying it to people who will spend it.