This rather fatalistic and certainly dismal view of capitalism can be challenged on two levels. It presumes, first, that the return to capital diminishes slowly, if at all, as wealth is accumulated and, second, that the returns to wealth are all reinvested. Whatever may have been the case historically, neither of these premises is likely correct as a guide to thinking about the American economy today.
So why has the labor income of the top 1 percent risen so sharply relative to the income of everyone else? No one really knows. Certainly there have been changes in prevailing mores regarding executive compensation, particularly in the English-speaking world