Yang makes excellent points. Too bad his argument has never been true. Think about every innovation throughout history: printing press. Railroads, steel, cars. Buses. Etc. the biggest being the personal computer...no need for secretaries, math people, accountants. CAD (engineers). PCs were invented in the late 80s. Yet the greatest job growth was in the 1990s. Despite accounting software we (Turbo tax, etc) there are more accountants employed now than ever.