First of all, before you reply please read the article. This is from an Australian-based study, so throw out your assumptions related to American situations (ie the need to let teens roam or what not).

Given that, I think the issue is far simpler: Increasingly extreme work-related demands is causing strain on families which manifest in poorer parent-child relations and higher rates of depression.

Essentially, the world is following the trends that Japan went down a few decades ago. Parents are working longer hours for less pay, with lower family interaction. Teenagers aren't stupid either, they see these trends from their parents and either stop engaging with society altogether or lash out.