According to your link, world inequality as a whole is down. This article is about how inequality within a political system (say the USA) affects social stability. Within this context, it matters not whether or not millions of Chinese and Indians have been lifted out of absolute poverty, because those people are not part of our political system.
It's actually a pretty interesting article, you should read it, rather than dismissing it because of your political bias.
It's actually a pretty interesting article, you should read it, rather than dismissing it because of your political bias.