(Another theory as to why financial services become larger as economies develop: as markets advance and become more and more sophisticated and fluid, capital ge

(Another theory as to why financial services become larger as economies develop: as markets advance and become more and more sophisticated and fluid, capital gets rapidly deployed in industries where productivity is high such that the prices in such industries get driven up quickly and the ROI lowers, rendering the productivity less financially rewarding, UNLESS you are the first one there, which is another selling point of the finance industry (aka. finance will find the deal and get their first) - really another topic though)