No. It isnt...15% is the actual number that any economics lesson will teach you. A meal will cost you 1-3 bucks? What are you eating, Ramen noodles for dinner? For $1 you literally can't even buy a pack of gum. I'm not gloating one bit either, I myself am single (to the irs at least). My girl and I live together, but I don't have kids. I'm sure when I have a family my expenses my will change in how their delegated, but they'll never go down...only up. 75% of my company is older than me, all of which have families etc...and we order in almost daily together.