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Also worth adding that in terms of general "why benefits" there was a significant discussion among early economists on that subject back in 19th century. One of the most systematic voices on that topic was... Adam Smith, who is today associated with laissez-faire market - incorrectly, and mostly by under-educated neoliberals. In his "Inquiry ..." he lays ideas that today would be probably classified as "socialism", especially in the US. http://www.gutenberg.org/files/3300/3300-h/3300-h.htm#chap35
