The study of inequality has been going on forever. To give you an idea, the index used to measure how unequal the distribution of income is -- the "Gini Coefficient" -- was invented a century ago. So, why the sudden interest? Why worry now about something that has been the fodder of academics, politicians, and the media for so long?
Does anyone in their right mind think that any country would willingly put itself through what Greece has gone through, just to get a free ride from its creditors? If there is a moral hazard, it is on the part of the lenders -- especially in the private sector -- who have been bailed out repeatedly.
It used to be thought that America's greatest strength was not its military power, but an economic system that was the envy of the world. But why would others seek to emulate an economic model by which a large proportion -- even a majority -- of the population has seen their income stagnate while incomes at the top have soared?