I think you missed the point of the quote:

Orwell is saying that to see someone suffer is in line with our ethics; someone who suffers can be ethically reasoned to have earned what dues come their way.

Compare the beggar in orwell's quote, if you will, to the injured war veteran who benefits from a fundraiser. He has suffered, so we consider it worthy for him to benefit through community actions.

Why is he worthy of the benefit? Because he suffered. I am not worthy because I have not suffered as he has. The beggar? Suffering.

You are thinking very stringently if you are interpreting the quote as a 'literal' trade, broken toe for dinner for a week