Peoples behaviour is a feature not a bug, the lower class isn't being destructive but reacting as a wounded bear does when cornered.
I am not an optimist, this is but a prelude of disaster to come. Its never ONE disaster that undoes a civilisation, its the accumulation of disasters. Its the trickling, slow bleed. Yes the migrant crisis seems manageable now, and up front it may seem so but over time it will likely bleed Europe dry. And its just ONE problem, others will be the obvious ones of employing people, climate change, OTHER refugee crisis' that will likely happen as more of the world falls into hard times because of the previous. Maintaining expensive security states to prevent terrorism, the increasing boldness of say groups like ISIS, and of course we still are overdue for a big world wide pandemic.
Even Juncker has said Europe's good days are most likely behind it, the good will never return.
Societies crumble from the build up of problems. Any ONE problem is tractable, all of them together are not.
Finally, for the Working Class, they have adapted, they have unsheathed a terrible and swift sword of vengeance and wield it against the masters. The annihilation of the working class and the blighting of these regions was taking place either way. What you want is for them to play a hopeless game, I suspect they have caught on to the real truth of how you win a game, you rewrite its rules.