I got a call from a woman who was looking for an editor for one day, with a day on ohld, to do some crappy corporate job on a cheapo system in a bad part of town. I quoted her my Turner rate, which is a reduced "Frequent flyer" rate. She said she was used to paying about half of what I quoted her. I explained that since I was self-employed, I have to pay self-employment tax, my own insurance, SEP, etc so I really only see half of that rate anyway. She seemed quite put off and announced that she, too was self-employed and she knew how it worked. She asked if I could recommend anyone, but I don't know any editor who works for what she says she "always pays".
Thank god for the Turner networks!