Here is something to consider when making a choice whether to be a two income family or not. In a modern Western society, does it even matter?
Let me illustrate my point by examples. I know a couple of people who by different reasons live in subsidised housing. One is sick and couldn't work any more. The house looks quite decent. She has time to cook nutritious meals and she has housekeeping help from the government. The neighbourhood she lives in isn't really bad. There is a huge beautiful park right behind her house. People in this situation won't have money for luxuries and expensive vacations, but they still can afford clothes, shoes and even going out sometimes. If by health or money reasons they can't drive, we have a good system of public transportation.
On the other hand, some (young) families I know went for a 2 income lifestyle. Some took a huge amount in debt to live in a similar 3-bedroom house, in a slightly better neighbourhood. Of course, there IS a difference, I know there is. The point I'm trying to make is that the said difference isn't big enough, at least in the country I live in, to justify the debt and children being raised by strangers, imo. Unless you are a surgeon or a lawyer but live from two lower middle class/working class salaries, there won't be any huge rise in your standard of living compared to a one-income family, and if you are a surgeon, you can afford for your wife to stay home full time and there still will be the difference between you and a truck driver, so to say.
So what's the point?