NHI economy

Has anyone thought about how then aliens afford to pay the engineers to build their space craft and ships and cloaking systems? Thus must pay for the energy source to power the ships, keep them clean, cooks. Think of it as an aircraft carrier. They are expensive. But my question is what is their form of government and society and politics? Are they communists, capitalists, socialists, hive mind…. Maybe they have a type of society/government/economy way of doing things we humans can’t grasp or...