Most of the developed economies of the world have seen lower productivity growth since the booms after WW2 and have never recovered to previous levels. There are some arguments to be made that much of our current economic growth is artificial as well. The IT revolution has also not made much of a dent in overall productivity growth, at least as of yet - I don't know whether this is an artifact of how its measured, or the growth is yet to come, or perhaps there really isn't any growth. The bigger point is that our economies are simply not designed to work in a world where there is low growth [1]. In a zero growth world, the only way to make money is to take it from someone else, so you get more zero-sum behavior. The slow growth is also in line with what folks from the WEF are saying [2]
[1] https://www.strongtowns.org/the-growth-ponzi-scheme
[2] https://investmentmonitor.ai/global/the-urgent-case-for-stak...