To Teary Oberon:
The link you provide makes a gross mistake when it sites a Census Bureau report as being false and irrelvant because it uses the mean instead of the median. If you review the report, it is using the median and thus not skewing towards the results by super wealthy individuals. Even this chart not mentioned, but nonetheless showing similar results, uses the median.
To Everyone:
I do think that the education system in America is boken. It's grossly expensive and some members of our government are trying to continue to cut costs and privitize education. They are pushing MOOCs as a way to fight the rising costs, but this will lower the quality of education for all but the most wealthy individuals who can afford to attend the schools where the MOOCs are being produced (flagship, ivy league, etc). I'm not against these types of college classes. I've taken 10 free or nearly free courses in the past year and learned a lot. They are great as supplements, but they currently don't count as credit towards an accerdited degree and 8 out of 10 of them were not as rigorous as a real class would be. You're lucky if you even get the chance to interact with a TA on the forums, let alone the professor as tens of thousands of students are taking the class with you. You watch, in some cases, prerecorded interactions of the professor with students at MIT. It's very engaging (such as professor Eric Lander in Intro to Biology), but you are still watching an interaction, not participating.
One way we can make our education system better is to return to the model we had in the 1950s where the US government invested heavily in education and public universities were free. For example, did you know that in the 1950s the cost to attend UC Berkely was $0. Today it's $11,000 a year. So in my opinion any concern that education has a low return on investment is in part due to the high costs of attending, which is an artifcat of the effort to reduce spending on public inititives like education.
If we want education to offer a better ROI we need to start electing the type of people into our government that will reduce the costs of attending by increase public funding. A healthy working class that is well educated is what will improve our economy. The whole concept of companies and captialists being job creators is faulty. The job creators are those that create demand (the working class). If the working class has supressed income (as we have now with income inequality being nearly as high as it was in the 1920s), our economy will likewise be supressed.
For more details on this see the excellent documentary by Robert Reich, a best-selling author of thirteen books, Chancellor’s Professor of Public Policy at UC Berkeley, former Secretary of Labor in the Clinton administration, and a foremost expert on economics: Income Inquality for All.