"So-called macroeconomics has never been real economics but rather an endless series of engineering-type models purporting to guide politicians in centrally planning an economy. In the bizarro world of macroeconomics all capital is the same, and all workers are the same, as one big lump, expressed as 'K' and 'L' in the models. Relative prices and their role in allocating resources in a market economy are mostly ignored, while 'economic aggregates' are said to influence 'the' price level. In macroeconomics it is taken as a given that markets are incapable of allocating resources in an acceptable way; that's why there is supposedly a need for macroeconomic central planning in the first place. No such 'failures' are assumed on the part of the macroeconomic central planners."