When you're an independent consultant, eventually you'll experience one or more of the “negotiating tactics” hilariously illustrated in this video (hat tip to Brad Fitzpatrick, where I first saw it). In this economy, unfortunately such tactics become even more common.
The video isn't just funny, it's an excellent illustration of how absurd these requests really are. If a client tries to work you over, stick to your guns! The value you're providing to them remains the same — recession or no.