I don't know if you're a rich guy planning to marry down in the social hierarchy, living in a culture where where women don't work or just a misogynist but this is generally false in the west. Dual incomes with a single household is very economical compared to life as a single.

See eg. http://www.investopedia.com/terms/d/dinks.asp "A household in which there are two incomes and no children (either both partners are working or one has two incomes). DINKS are often the target of marketing efforts for luxury items such as expensive cars and vacations."

Except this if the wife can hear you working then it's probably not a dual income home.

Edit: Prior probabilities yada yada.

If your wife expects you to support her financially. Fortunately, such arrangements are no longer mandatory.

... or if she expects to date you and be impressed before marrying you...

Depends on what else you're getting out of the arrangement.

A wife is still more expensive

Really? Mine is profitable...

Really? What sort of margins are you getting for her per hour?

It's hard to make precise, depending on a whole host of factors. It's clearly positive, however, as our burn rate on just her salary is far lower than it would cost me alone to maintain my lifestyle.

Not to mention 50% equity :)

A spouse might already be a sunk cost.

That’s right, you are not going to get any one cheaper to change your adult diapers. HA!