In light of this, let us modify Singer’s argument:
If you have to save people at a “relatively small cost to yourself”, and you allow for a cumulative amount of small costs to add up to a large cost, you run into a heap paradox. You’re going to have to pick some point at which the cumulative small costs make up a large one, even though the costs before and after the threshold don’t differ much. Of course, this also means that you can pick two children as your threshold.
(It also raises the question “if your society already redistributes your money to children, have you passed the threshold just from that?” Your taxes may be enough.)
Along these lines, Scott can be quoted:
Scott doesn’t apply this to EA, but if you start from having to save a child, and the end point is “you have to sacrifice a lot to save as many children as you can”, this seems relevant.