Are you judging your usefulness by raising offspring? Well then your offspring that go against your wishes will count against you.

Do you judge your usefulness by buying your own food? Well people who don't work eight hours per day get by on a dollar sandwich pretty easily.

Do you judge yourself worthy by being able to help those with less money live at a standard closer to yours? You will be judged by the standard you can exist at when your own resources are depleted.

Very simple.