The secure tenancy agreement hasn't changed, the rights are part of the 1985 Housing Act which also outlines succession terms.
This is part of my job I hate, informing people that they have to leave their family home and move to a one bedroom flat, very often only weeks after they have suffered the death of a loved one.
You say "People who worked in housing used to have basic feelings" - People desperate for a home say the same type of thing to me, and also ask why single people are living in 3 bed house that would suit them perfectly. I dont mean to sound harsh and I honesty appreciate your situation but social landlords need to make best use of the dwindling housing stock.
Locally, we are offering tenants £1000 per bedroom if they down size to a smaller property which in my opinion reflects the situation. For example a sole tenant in a four bed property would get high priority on their application, direct let status and £3000 in cash. We have about 25,000 people on the waiting list which we are also legally obliged to assist.