In my experience it's a lack of communication. I was in hospital recently. I saw the consultant at 9:00 who said I was ok to go home after I'd had an iron infusion, so after lunch.
I rang my adult child to arrange for them to pick me up. We decided that 2:30 was sufficiently "after lunch" for them to rearrange that days meetings to accommodate my pick up.
at 11:30 I asked when the iron infusion would take place. I got no answer. At 2:00, well after lunch, I was asked what I wanted that evening for dinner. I said I wouldn't be there for dinner.
I was overheard by the ward sister who said I wouldn't be going anywhere until she said so.
I explained what I had been told five hours earlier. The sister said she knew nothing about that. I'll admit I had a little more of an edge to my voice when I pointed out to her that their lack of communication was not my issue, and I would be leaving when I chose, not when she granted permission.
it was all so silly. I could have had the infusion ( it took less than half an hour) and been out of their by late morning. Instead it took until 4:00 and even then my adult child has to return the next day to pick up my discharge papers.
so I was a bed blocker, for a couple of hours.
I guess that's not the kind you mean. I guess you mean those who no longer need nursing care but cannot safely be sent home until social care can be sorted out.
and these are the people you think should be sat in chairs? People who may not be able to use the lavatory without help, people who have broken hips that now just need rest so their bones can mend?
some people seem sometimes to be lacking in the milk of human kindness department.