I don't really see how patients so severely ill that they need a bed in A&E with dedicated nursing provision could be discharged into community social care, though maybe I'm missing something...
Until they go, A&E can't admit people through to the beds they're currently in.
Even if you lie to the population and claim you'll add 7000 beds this winter, those beds aren't staffed. We can't surge 5000 nurses and 2000 support staff out of nowhere. They're all busy.
It's all about throughput. You're only looking at the front while the problem is in the back.