There are lots of ways to make extra money. People just need to adjust to their situation and found ways situatable to them.
One example: One friend stay at home taking care of her own baby and at mean time taking care of 8 other kids at home. Their income can compare with two income family.
One friend driving kids to/from school to make extra $1000 a month.
You can even get a license for broker and got a second income.