Actually he didn't complain about his lack of access to data, but he probably should have given the column he wrote today. Brooks purports to lecture the Occupy Wall Street crew about how they are focused on the wrong inequality.
He tells them that that there are two inequalities in the U.S. On the one hand we have the CEOs, the Goldman Sachs crew, the lobbyists and the other members of the one percent who have done incredibly well in the last three decades. Brooks calls this the "blue inequality" since the really rich crew tends to live in places like New York City and Washington, DC that tend to vote Democratic.
Brooks tells us that this is less of a big deal than the red inequality, which he defines as the gap between college educated workers and those without a college degree. He tells us that this is the more important form of inequality. He tells us that this is a much bigger issue, since it affects so many more people.
This is where Brooks lack of access to data is so important. The wage gap between college grads and non-college grads is really a 90s story and even more an 80s story. In the last decade, workers with only a college degree (i.e. no professional or advanced degree) did not share in the benefits of economic growth. The ratio of the wages of those with just college degrees to those without college degrees has not risen much since the early 90s.
Wages of non-college educated workers did suffer badly in the 80s due to policies such as the over-valuation of the dollar that made many U.S. manufactured goods uncompetitive internationally, the deliberate increase in unemployment during the Volcker years which threw millions of non-college educated workers out of work, and anti-union measures (e.g. the firing of the PATCO strikers and an anti-union National Labor Relations Board). However since the 90s, the wages of workers with high school degrees have not departed much from the wages of workers with just college degrees, the vast majority of the economy's gains have gone to the top 1 percent. It is too bad that David Brooks apparently does not have access to this data.