In an earlier day, the rich lived at the expense of the poor, directly and unequivocally; in a modern economy, unproductive citizens increasingly live at the expense of productive ones-though in an equivocal way, since they are told, and believe, that they are disadvantaged and deserve more still. Today, in fact, a good half of the population of every modern nation is made up of people with little or no income, who are exempt from taxes and live, to a large extent, off the other half of the population, which pays taxes. If such a situation were to be radicalized, it could give rise to massive social conflict. The eminently plausible free-market thesis of exploitation by the unproductive would then have prevailed over the much less promising socialist thesis of the exploitation of labor by capital.