Richard Wilkinson gets it wrong in economic inequality

Paul Graham sketch a causal relationship: accelerating variation in productivity (by startups) is always going to produce some baseline growth in economic inequality.

Richar Wilkinson, OECD and IMF show a positive correlation between the degree of economic inequality and the social and public health problems as well as the decreased economic growth over the long term.

Silicon Valley is not known for its social and public health problems.

Consequently, the statement may be true: social and public health problems and lack of relatively high economic growth is also one of cause of inequality, not the other way around.