Thomas Piketty, in his massive tome, Capital in the Twenty-First Century 6, the 21st century sequel to Karl Marx’s great work, adds to the large body of evidence on rising concentration of income and wealth. Piketty argues that generally wealth grows faster than economic output.
44 Increasing automation in the workplace is  43  See Stephanie R. Aaronson, Mary C. Daly, William Wascher, and David W. Wilcox (2019), “Okun Revisited: Who Benefits Most from a Strong Economy?” paper presented at the Brookings Papers on Economic Activity Conference, held at the Brookings Institution, Washington, March 7–8, https://www.brookings.edu/wp-content/uploads/2019/03/Okun-Revisited-Who-Benefits-Most-From-aStrong-Economy.pdf.