The document discusses the divergence between the "new economy" (non-financial services sectors) and the "old economy" (commodity, industry, finance, construction) as the main problem for the world economy today. The trajectories of the new and old economies were similar in 2000-2010 but have since diverged, with the new economy continuing to grow while the old economy struggles. This divergence explains issues like high debt and unemployment in developed countries that rely more on the old economy. Monetary and fiscal policies have aimed to support the failing old economy for social reasons, but this is not a long-term solution.