There are those who claim socialism has never had a good, thorough test of its effectiveness. If so, France is about to give it that test. Now we'll see how well it generates both wealth and fairness. See this Los Angeles Times article for details.
Socialists have majorities in both houses of the French national legislative body, plus the presidency and the mayorality of many major cities. If they can't make it work with that kind of majority, they simply cannot make it work period.
COTTonLINE's prediction: Socialists cannot make it work, because their underlying assumption of how human beings work is flawed. We are much more greedy than we are altruistic, although admittedly we are both to some degree.
France may be able to increase perceived fairness, we doubt they'll be able to increase wealth. That's our view, for what it's worth.