OK. Instead, make food aid conditional upon sterilization. Give them the choice. Want to make as many babies as you want? Then feed them yourself.
Your approach, though -- coercing the hungry by making their survival contingent upon reproductive self-mutilation --- shows sheer contempt for poor people as people.
All of us have hungry people in our ancestral line, because all human societies have gone through famines, and all families --- viewed inter-generationally --- have gone through had times. People often survived by getting help. It goes all the way back to Genesis, if you are familiar with that.
If your scheme had been accepted, you would not exist.
None of us would.