The document discusses why global economies have become increasingly dependent on central bank monetary stimulus to boost economic growth. It argues that a variety of imbalances, such as globalization, debt levels, environmental regulations, and aging populations, have reduced the productivity of capital. To counteract these imbalances, governments and central banks have lowered interest rates, enacted quantitative easing programs, and reduced banking regulations to increase the amount of money and credit in the economy. However, relying too heavily on monetary policy to stimulate growth risks creating larger economic distortions over the long run. Addressing the underlying imbalances through productive economic and social policies could help reduce the need for continual monetary stimulus.