[klyrs]

You mean, like, "To each, what they need; from each, what they are able?"

[s1artibartfast]

The problem is that there are several stable equilibriums to that proverb:

Everything can be taken from a slave and dead people need nothing.

To rephrase in a less hyperbolic manner : desire is unlimited, and you need force to extract work from the unwilling.

[pjkundert]

Of course, the unstated subject of “from each” is always you…