Back in the 1950s, 1960s, and early 1970s, three factors helped facilitate the transition to adulthood. First, there were jobs that provided good wages even for high school graduates. A college degree wasn't necessary to earn a decent living. And if you wanted to go, college was far more affordable. The second was an economy that lifted all boats, with productivity gains shared by workers and executives alike. The result was a massive growth of the middle class, which provided security and stability for families. Third, a range of public policies helped facilitate this economic mobility and opportunity: a strong minimum wage, grants for low-income students to go to college, generously subsidized state college tuition, a reliable unemployment insurance system, enforcement of the right to join a union, major incentives for homeownership, and a solid safety net for those falling on hard times.
This world no longer exists.