... this may seem crude, but allow me to respond to your wife's argument with this:
Do you really still think it's a valid concept?
tell me, Grimm, in honest and full detail: What food did you consume today? Start with breakfast, include all snacks, then lunch, dinner, supper etc. Please also advise what food scraps were thrown away in your household today.
Then enlighten us all with the positive, actual, tangible methods you have employed to assist those in the world who are hungry.
You self-righteous twat.