This is a followup question to: Is innovation in decline because of inadequate incentives?
The Economist February 27, 20120 issue in the Free Exchange column alludes to an article, Are Ideas Getting Harder to Find? (2019) by Nicholas Bloom, Charles Jones, Michael Webb, and John Van Reenen,
But if society solves more problems, shouldn’t that increase the number of problems to be solved? For example, the advent of electronic computers created new fields related to algorithmic efficiency, data compression, software puzzles, entertainment, creation of digital social media and so on. That examples implies that the number of questions available for research should be increasing. Why would innovation be in decline? (Or maybe it isn't?)
Here is an analogy. I don’t know if it applies. When Rome became rich under the Empire, it was possible to get rich by politically obtaining more of the existing wealth, rather than adding to the already created infrastructure?
Is it possible that a similar effect could obtain in a mature academic system? Might there be more financial reward in protecting existing academic turf that seeking out new, riskier academic domains? Your thoughts?