[renewiltord]

It seems to make sense to me. You evaluate whether your actions are doing the most good in the world according to your metrics. For example, should I work at a soup kitchen for a day or work in my day job in HFT for a day and donate it all to a soup kitchen.

With the latter I could support quite a few people at the soup kitchen for that day.

You can take that to whatever extent you desire. Should I donate to guineaworm eradication or local libraries? And so on and so forth.

And the general EA community rates lives highly. So max lives saved usually trumps everything else.