The size of an industry and the number of people that it employs is hardly a measure of how it benefits society. People are employed in the global spam, fraud,

The size of an industry and the number of people that it employs is hardly a measure of how it benefits society. People are employed in the global spam, fraud, and mafia markets, and they spend their income on such wholesome things as housing, groceries, computers, expensive wine/cars/vacations, art. Doesn't mean that the industry contributes positively to society.