I don't blame them one single bit. When your reputation is to run up big bills and then pay only a portion of what you agreed to up front once the work is done, eventually you're going to have trouble hiring people to work for you.
You can't have a real justice system if people accused of heinous crimes cannot get reasonably good legal representation. And from what I've heard, court appointed lawyers tend to be WAY over-worked and under-resourced, so I wouldn't consider that option reasonably good. While it would be a shame if our total asshole of a president can't get a law firm to represent him, that would not be related to our justice system -- it's related to his lack of personal integrity.