the idle youth and the loneliness of the old are both a result of and a contributor to the evil’s you have named IMO.
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That's how I read it. That strike at the foundation-less is to strike against the world's problems.
To upshore foundations with the impressionable youth and to show concern and care for the elderly is a path to ending great evils.
Hoping I am making some sense - this is not my most elegant post - I need to reflect upon this, but I think I see Pope Francis' point.
I think, but maybe not!
Idle hands are the Devil’s workshop.
If young people still had to get up before dawn and put in an 80 hour week on the farm, we’d have a whole lot less crime, delinquency and social decay.