The document discusses how too much growth in the financial sector can be bad for the overall economy. It presents a study that found a negative link between financial growth and real economic growth beyond a certain point. When private sector debt passes 100% of GDP, the "too much finance" point is reached, where high financial development leads to lower productivity growth. Some negative effects of reaching this point include skilled workers being drawn into finance rather than R&D, misallocation of resources into property development rather than high-tech industries, and overall financial instability. The document suggests diversifying investments and encouraging financing of less risky industries to help address these issues.