to say "absolutely no limits to patentability left" about the American patent system. That statement is slightly exaggerated. Thanks to Trevor Hill for pointing this out in a comment.
The American patent system is not completely out of control. It is not running amok.
It just looks that way compared to European standards, if I hear that the American system accepts patents on insuring against gambling losses or against divorce (thanks to Rainer Langenhan for the pointer).