Private military contracting and undersea welding are both dangerous and require fairly specialized skills. Waste management, though critical for the proper fun

Private military contracting and undersea welding are both dangerous and require fairly specialized skills. Waste management, though critical for the proper functioning of society, is a low skill job and not particularly dangerous, which keeps the wages low. And medicine, finance, and consulting, require a fair amount of intelligence and the barriers to entry are high, keeping wages high.