[as1mov]

Money is a pretty objective assessment what's a person's worth. It's an actual measurable quantity, it's meaning doesn't vary from person to person like it does other indicators of worth (i.e looks, personality, altruism etc.)

[kjeetgill]

I'm not sure anything about the question at hand, a person's worth, is objective. Money is easy enough to measure and compare though, and I think that's part of it's appeal as a measure. It's precise even if it's not accurate.