In a high cost-of-living place like greater Boston, that's just not true. For example, consider a family of 4 (2 adults and 2 young children), living in a 2-bedroom apartment in eastern Massachusetts:

- 100,000 household income, about 1/3 of that is going directly to income tax. Net is going to be maybe $70-78,000.

- average 2-bedroom apartment rent is around $2800-3200/month: call it $34,000/year. (Because they rent, they can't benefit from mortgage interest tax deduction.) This doesn't include utilities, which have gone bonkers in MA the past few years.

- Childcare/preschool for young kids in Massachusetts is between 15-20,000 PER CHILD PER YEAR. Our example family could be paying $30,000 a year for childcare so both parents can work.

- It's possible that one or both parents are still repaying student loans at 7% interest. Let's say only one parent has a student loan payment, $300/mo which is a little under the average for MA. $3,600/year.

- This example assumes that nobody in the family owns a car! While I know families with young children who get by on public transit only, it can be difficult even in the heart of a city.