Why pay more? To be as far from possible away from the first client that the contractor ever worked for, because all those years of experience mean more efficient work and fewer costly mistakes.
I love working for non-profits. The rewards go far beyond money. But they have to begin with money.
The downturn flooded the communications market with self-employed contractors. Non-profits could finally hire highly qualified communicators to do the same work as was recently done by less qualified people, at no greater cost. But there were, and are, downsides.