$170/ week x 52 weeks = $8,840/ year, which is AT LEAST $10K a year before taxes.

Give yourselves a raise, and stop eating out. Take turns with your family hosting dinner at home. I almost always bring my lunch, mostly leftovers, and when I don't and have to buy lunch, I regret it every time. My food's better.

As for all your friends, who knows how they're really doing? They could be living paycheck to paycheck, making minimum payments on their CC's, and Googling "bankruptcy."

eta: Oh, and sit down with your wife and think about what it would be like if one of you couldn't work. Pretend you don't have her income, and start saving it (as a couple.) Learn to live on less. You'll feel a lot more free this way, plus you'll have savings, which is hard to beat.