But: it is very well known that one of the big problems with the NHS 'efficiency' is the number of NHS hospital beds occupied with people who cannot be discharged as there is no person or organisation to care for them. If you really want to improve the efficiency of the NHS, one of the biggest single things you could do is invest in social care.

Yes, the hospitals need somewhere to discharge patients to avoid bed-blocking.
The ideal would be 'cottage hospitals', or 'respite centres'!
Unfortunately, they're gone.