Failure to achieve these kinds of social gains through public investment might seem like a very basic element of injustice within our society. But it also looks like strong evidence of system failure: the political and economic system fail to bring about as much public good as is possible in the circumstances. The polity is stuck somewhere on the low shoulders of the climb towards maximum public benefit for minimum overall investment. It is analogous to the situation in private economic space where there are substantial obstacles to the flow of investment, leaving substantial possible sources of gain untapped. It is s situation of massive collective inefficiency, quite the contrary of Adam Smith's view of the happy outcomes of the hidden hand and the market mechanism.
Albeit Smith's analysis included a critique of the political apparatus as being captured by powerful interests to the detriment of society.