I'm suggesting...
Why don't they send all the 20-50 age group back into society (minus those with conditions/anxiety). In theory, if they catch it, it will likely be more like a bad cold and it seems many are happy to be shoulder to shoulder in pubs etc. They will be injecting money into the economy and building up herd immunity but the NHS could cope with the low numbers that would need help in hospital.. They would be able to see older family members with masks/distancing. Meanwhile, 50+ can work from home where possible, and after a period when the virus has gone through 20-50 age group, they could also return to work. Vulnerables will have to stay close to home/mask up until vaccine/treatment arrives.
Presumably young students belong in the main to the 20-50 age group anyway.