The OP doesn't know how much the sources have spent from their allocation vs their earned sMerits, so I'm guessing all of their spending will be subtracted making merit sources less likely to appear on this list.
The only thing that Op can do is:
[Received merits(-1 if odd number)/2] - Sent merits = merits on Bags.
Looking closer at the list this seems exactly what he has done, completing ignoring airdropped and source sMerit, which seems confirmed by comments like Jet Cash's and LoyceV's which state they have hundreds of sMerits available yet do not appear on the list at all.
Given that this information is private, I'm not sure there is a way to fix OP's list. As I mentioned before, I also don't think it is fair to list merit sources and people who have earned the most merit, who have given out hundreds or even thousands of merits, as being the most "selfish" because they still have a handful of merits still to give.