Lawrence Summers has a pretty interesting review of Thomas Piketty's book. Professor Summers writes:
Even where capital accumulation is concerned, I am not sure that Piketty's theory emphasizes the right aspects. Looking to the future, my guess is that the main story connecting capital accumulation and inequality will not be Piketty's tale of amassing fortunes. It will be the devastating consequences of robots, 3-D printing, artificial intelligence, and the like for those who perform routine tasks. Already there are more American men on disability insurance than doing production work in manufacturing. And the trends are all in the wrong direction, particularly for the less skilled, as the capacity of capital embodying artificial intelligence to replace white-collar as well as blue-collar work will increase rapidly in the years ahead.
Probably the two most important steps that public policy can take with respect to wealth inequality are the strengthening of financial regulation to more fully eliminate implicit and explicit subsidies to financial activity, and an easing of land-use restrictions that cause the real estate of the rich in major metropolitan areas to keep rising in value.
I disagree about the financial regulation, but the land-use restriction stuff is pretty interesting coming from Professor Summers. What's he talking about? Historic landmark districts? Zoning? The California Coastal Commission? Environmental reviews?