Dad, are we rich?

Son : "Dad, what is rich?"
Dad : "Rich is when you have a lot of money"
Son : "Do you have a lot of money?"
Dad : "Well, I think that eumm, I can buy things we need in this family, so I think I just have enough money"
Son : "Enough?"
Dad : "I'm afraid I said so, anything wrong Son?"
Son : "It must be a polite word to say you have a lot of money"
Dad : "Well, you have lived in this house for long, you tell me then"
Son : "So it means that we rich?"
Dad : "Surely No"
Son : "But you just said that you have enough money, don't you?"
Dad : "yes and the subject refers to me, not us"
Son : "what's that suppose to mean?"
Dad : "I am rich Son. you? sorry to say dear but you have nothing"