In 2005, I had a research contract for Harvard University. The objective was to determine how to adapt our tax regimes to globalization. All those issues, which are current problems, were not very well known at the time. This research contract led me to conclude that we must slowly work towards global tax co-operation. That will probably be the only way to replace this tax competition between countries, which is at the very root of the problem.
On June 17th, 2013. See this statement in context.