Is there also a possibility of an incalculable factor which will yield a return on investment given that this project would bolster a middle class thus creating

Is there also a possibility of an incalculable factor which will yield a return on investment given that this project would bolster a middle class thus creating an increased likelihood of higher education for the next generation? My point is that something like this is never fully thought out and the future isn't written yet. These projects could boom or bust.