Recent riots in Sweden — by some measures the most "equal" nation on earth — raise some interesting questions about the state of equality in Asia, including in Japan, that are well worth pondering.

For several days recently, the Scandinavian nation, perhaps better known for the songs of ABBA sung regularly in Tokyo's karaoke bars and as the home of the Nobel prizes than for scenes of unrest, was rocked by protests attributed in part to young, unemployed immigrants, some of whom set buildings and cars ablaze, perhaps testimony to the reality that inequality exists everywhere.

The news also had me revisiting the latest rankings of inequality in Asia, as measured by the "Gini coefficient."