I think it's a matter of France simply having an un-innovative economy compared to other welfare states.
In order to have welfare states be sustainable you need to have some kind of wealth generating cash cow type industry. Norway & Denmark have access to North Sea oil, Denmark in particular is home to one of the world's largest shipping giants (Maersk), and Sweden & Germany are host to a lot of high tech manufacturing (Germany), software development (Sweden) respectively.
What does France have other than wine, cheeses, and tourism? Tourism isn't gonna work if fat ass Americans have a devaluing dollar and can't spend as much on travel anymore, and cheese & wine exportation will be quite limited profits wise with a tariff regime imposed by angry orange man.
Remember Greece has an economy very similar to France (agricultural cash crops, tourism based).