yep, but I guess most people are ok with this, we have a lot of people saying that teachers are priviliged people having too much vacations and not working enough per week. It's a strong common belief.
And with current government politics, it looks like we are witnessing the end of a public education in France, the unqualified contractuals teachers hired after a quick interview is more interesting financially than an official.
The relative freedom enjoyed in academic jobs isn't enough to compensate an increasing salary gap between public/private sectors. In expensive cities, it can even be hard to live decently with a teacher/lecturer salary, and certainly not possible to save for your retirement. If you can't rely on external sources of income, I think it's not reasonable to engage in these activities if more lucrative alternatives exist.
And considering France increasing public debt, I don't see how the situation is going to improve.