Agreed --- looks like the rankings of the variables are the same for each country, and even the ratios vary only slightly. This information would be better presented in a table (with standard error reported) or a bar graph. The original OECD[1] report presents this information much more lucidly. When The Economist filtered the OED report, they should have paid more attention to clarity of presentation.

[1] http://www.oecd.org/document/24/0,3343,en_2649_34637_2671576...