The Constitutional Council approved the new soda tax, announced in August as part of the government's fight against obesity and within the framework of a broader austerity programme, after it was passed in parliament last week.

The tax, which works out to one euro cent per can of drink, is expected to bring in 120 million euros ($156 million) in state revenues.

The tax has been slammed by beverage firms including Coca-Cola, which in September said it was suspending a planned 17-million-euro investment at a plant in the south of France in "a symbolic protest against a tax that punishes our company and stigmatises our products."

Answer: lobbyists. Government needs to dominate enterprise when it comes to clear cases of the public welfare. This is something America used to know and has long since forgotten.