An interesting paper on the dynamics of income inequality from Xavier Gabaix, Jean-Michel Lasry, Pierre-Louis Lions and Benjamin Moll (December 2015, CEPR Discussion Paper No. DP11028: http://ssrn.com/abstract=2714268).
Take in the abstract alone for key conclusion:
“The past forty years have seen a rapid rise in top income inequality in the United States. While there is a large number of existing theories of the Pareto tail of the long-run income distributions, almost none of these address the fast rise in top inequality observed in the data. We show that standard theories, which build on a random growth mechanism, generate transition dynamics that are an order of magnitude too slow relative to those observed in the data. We then suggest two parsimonious deviations from the canonical model that can explain such changes: "scale dependence" that may arise from changes in skill prices, and "type dependence," i.e. the presence of some "high-growth types." These deviations are consistent with theories in which the increase in top income inequality is driven by the rise of "superstar" entrepreneurs or managers.”
So the key to alleviating inequality increases (if the key were to be found in income / wealth tax territory so frequently inhabited by socialstas) is not to tax all high earners, but to tax the very left tail of the high earners’ distribution, or so-called “"superstar" entrepreneurs or managers”. It’s not a 1% tax, nor a tax on wealth (capital), nor a tax on “anyone earning more than EUR100,000” (the latter being commonly bandied around the countries like Ireland), that is a panacea. It is, rather, a tax on Zuckerbergs and Bloombergs, Bezoses and Ellisons et al.
Which, sort of, means taxing exactly those who create own wealth, rather than inherit it from mommy or daddy… Perverse? If it is the “high-growth types” that are the baddies, not the Rothschilds or the Kochs who inherited wealth, at fault, then the entrepreneurs should be taken out and fiscally shot.
And if you do, here’s what you will be fiscally shooting at: innovation (see http://www.nber.org/papers/w21247). The linked paper conclusion: “our findings vindicate the Schumpeterian view whereby the rise in top income shares is partly related to innovation-led growth, where innovation itself fosters social mobility at the top through creative destruction”.
Dust out that ‘tax the 1%’ argument, again… please.