I certainly don't believe in selling the family home to pay for long term nursing care, In saying that, I do think if the person requiring long term care lives alone, doesn't have any family to care for them,and needs the care of a hospice, maybe their property could be sold after their death, the sale procedes could be willed to the hospice.
JC you can see I am no economist, but it's people such as myself you would have to convince about citizen Income.
As for families sharing and extending the family home, thats fine if it works. Some people left home to get away from overcrowded living conditions.
The main reason extended family living ended was , - moving to find work, whole communities were broken up due to this. This was further encouraged by the "torie's" get on your bike Tebbit (sorry if I spelled his name incorrectly) . I also remember well who's original idea it was, that people out of work, should move to lesser accommodation - Mr Portillo.
I know there isn't an easy solution to the housing crises , but stating lack of family responsibility as a reason wont wash. how many kids left home , with parents stating "remember you always have a home here".
So the kids leave home to work miles away, then lose their jobs , they are under 25 , so yes they should get housing benefit