PG is wrong when he says "You'll never found the next Google this way", though. IBM was founded by someone who had a wife and kid to support, and had just been convicted of antitrust violations, fired, and had a 1-year jail sentence hanging over his head (later reversed on appeal).
You do need to be hungrier for profits and less willing to trade growth for money. The strategy I'm using (try lots of stuff until I build something useful, then try to get lots of users, then figure out how to monetize it) won't work for someone with a family to support. But the strategy my boss is using (go to your industry contacts, talk to them about their problems, get them to pay you up-front for development while you solve them, reinvest the profits for growth) could work very well.