Let contributors receive voluntary donations for their work

My point was, & remains, that some of us can't contribute because we have to make a living; this becomes more the case the older the would-be contributor, for example. And in many scholarly endeavors, key contributors do receive an income -- like James Murray, chief editor of the Oxford English Dictionary. If we were to enforce the ban on paid editting consistently, academics & other professional experts would also be banned from contributing in their area of expertise.

The Foundation pays programmers & other IT support people, all of whom like to work with computers. Why is it such a hard logical leap for people to understand that there are situations where we should pay contributors?