Besides which she owes Gordon Brown as she has clearly based one of her creations on him:
The Dementors are soulless creatures considered to be among the foulest beasts on Earth. They are soul-sucking fiends .... Dementors appear to have a generally human shape, approximately ten feet (3.05 meters) in height, but covered in dark, hooded cloaks that reveal only grey, decayed hands. ..... According to the author, they grow like fungi in the darkest, dankest places, creating a dense, chilly fog. .....
Dementors sense and feed on the positive emotions, happiness and good memories of human beings to move around, forcing them to relive their worst memories. The very presence of a Dementor makes the surrounding atmosphere grow cold and dark
The similarity is really uncanny.