Listen to yourself. This isn't normal, but on markets, it is.
> The "moral notion of value" is a nonsensical concept
No, it's the fundamental concept. Economic value should aspire to approximate it if we want the market to be a force for collective good. To the extent that economic value fails to approximate moral value, the economy fails to serve our collective interests.
In CS terms: greedy algorithms fail hard in predictable ways.
> [So why don't you give more through GiveWell?]
Because I'm stuck in a system that's designed to punish me for doing so above and beyond the intrinsic cost of providing for the kid. Here's a counter-proposal: I'd absolutely sign up for a wealth-proportional share of a tax for ending world hunger. I'm not poor, even by HN standards, so this isn't cheating, but the fact that this formulation of the solution wasn't obvious to you demonstrates how thoroughly you've been trained to see the world through the circus-house lens of wealth-weighted utility, and just how perversely that lens distorts the world.