Doesn't jive with my experience. A wife and family increaased my drive tremendously.

When i was single, I was a slacker mostly interested in partying. I would work just enough for rent and pot.

After our first son arrived 5 years ago (unplanned), I realized I had to make up for lost time, and have been extremely productive ever since, finishing my engineering degree, finally getting a "real" job in the industry, and then leaving that for my startup.

However, my wife constantly says I dont give enough time to the family. If I gave as much time as she wished, I doubt I would be successful.