"there are safeguards in place e.g. discretionary housing benefit"
As someone who once attempted to claim DHB I always tell people not to bother. Council's ask the most intrusive of questions and treat claimants of it as people trying to con money out of them.
When we enquired about it after one council failed to give proper information when we first mover from LA to private rented (don't worry about the slight difference in rent, just move in and we will sort it out then. Yeah, I'm stupid for doing as they suggested) we had some snot-nosed little git come out on our second day in our new home and tell us "it's best you actively start looking for somewhere else to live".
This isn't the "Welfare Reform Bill" this is "Welfare Cuts Bullsh*t"