I lay the blame on globalization. Top executives receive higher and higher salaries because they have achieved higher profits by exporting jobs to lower wage countries. And it is not only lower skilled jobs that are being exported. Many higher paying jobs are being exported or being replaced by robots. People are complaining about the disparity of wages but rarely if ever do they connect globalization and disparity of wages.
Hence Trump.
Actually they make more money even if they lose money for their shareholders. Sick.