Not at all - it's a sign of an economic system that finally accounts for ecological externalities. If we want to save the planet, human population needs to stop growing. So, on average, a person should only be able afford one child. And when you remember that wealth inevitably follows a pareto distribution, it's obvious that most families won't be able to afford any children at all.
That's not what happens. Population growth is outsourced to the third world (immigration, manufacturing, etc.) The planet (biosphere) will be hollowed out beyond repair by our ever growing economy. "Wealth inevitably follows a pareto distribution" is just an excuse for terminating your thinking.
