Sorry - can't link to the replies.
It was 'irony' - France is notorious for obeying only those EU laws which benefit it. In particular there are lots of unofficial barriers to other EU individuals/companies working in France - even though they are legally allowed to. Is't common for various levels of government to delay required licencing for years.
It's an issue even with international collaborations - the European Space agency is in the Netherlands and CERN is officially HQed in Switzerland - there was a lot of concern over ITER before it was built in France, the French 'promised' to play nicely with people working there.