The paper asks if auto-equilibrating market mechanisms will spontaneously equalise income growth rates and stabilise inequality. It concludes that the more likely scenario is continued unbalanced income growth. This, in turn, implies, on the economic side, consumption and savings flows which accumulate to changed stocks of indebtedness, financial fragility, and periodic macro-economic crises, and, on the social side, to increasing inequality of opportunity and political influence. Greater economic and socio-political instabilities are therefore the most likely consequence of increasing income inequality over time. Mais ces comparaisons posent implicitement que les niveaux actuels d’inegalite sont constants. Or, la distribution des revenus ne peut etre constante que si les revenus croissent au meme rythme a tous les centiles de la distribution.