could it also be the 2 year+ approval process, with your life scrutinsed under a microscope but with virtually no communication from the SW, and no idea of or if any progress has been made with your application,
This is how it has gone for us:
all paperwork from our side done almost two years ago.
all interviews and attendance on intro courses done 18mts+ ago
medicals ect done 1 year ago
references done 1 year ago and referees finally interviewed 6 mts plus ago
just SW paperwork to be completed and submitted for approval and then to panel
all through this we were told yes we were great candidates and she would try to get everything done as quickly as possible and she had two "kids" in mind for us over a year ago, but that the last carers she had processed had taken over two years to go through the process but promised that she would do better this time!
SW has sat on this paperwork for over 6 mts and done nothing,
the original snails pace of progress that we were able to prompt out of the SW with calls and emails has now ground to a halt,
she refuses to do paperwork and trys to get her colleuges to do it for her
(she quite proudly told us in one of our first of many interviews that she hated paperwork and particularly the new forms and would not use them at all but got some one else to copy her stuff from the old forms that she would grudgingly use onto the new ones)
Obviously this has approach has failed but she will not hand off our application to anyone else to complete,
all we get are just occasional very flimsy excuses as to why nothing has been done.
and yes in my area they are so desperate for carers that they regularly advertise for them in the press, but then just dont process the applications 
We are now at the point of giving up and telling SW department to stuff it
If this is how incompetant SW are at this stage i shudder to think what they will be like when we are actually carers and may need their help or advise.