Greece; proof that paying taxes is kinda important

http://www.npr.org/blogs/money/2012/01/05/144747663/how-a-computer-scientist-tried-to-save-greece

"It is around this point, two years in, that Spinellis had a disturbing thought. A new item on his mind map. Fixing Greece's tax system, and ultimately making the Greek economy work, was not a matter of tweaking his computer programs. It was not an information problem. It was a culture problem.
If the people don't want to pay taxes, the collectors don't want to collect, and the politicians don't want to punish them, perhaps Greece needs more than a mind map.
At the end of 2011, Spinellis resigned from his government job. He's back to teaching."

The idea that taxes should be avoided at all costs now has a test case.