The problem isn't with over-population. The planet is far from getting over-crowded. The problem is with the economic policies that are pushing too many people to frequently move around so much.
More and more people having to commute daily.. is the exact opposite of a good idea for a country that's dependent on foreign oil. Our public infrastructure is feeling the max burden from this ever-increasing moving around. Huge parts of our welfare money is going into building & repairing roads, bridges, tunnels, highways etc that only help us move around more and more; doing nothing that could really help make a better life for our children.
We need to figure out how to make do without moving around so much. We need to localize.