I think, as ever, context is everything.
I don't think anyone could reasonably completely rule out the idea of a benefits department ever having the option of conducting home visits under certain circumstances: for the tiny minority of claimants who abuse the system, and to keep it to a tiny minority, some element of policing and even deterrence is necessary.
But the context of this particular announcement is a long, long series of other policy initiatives which, in practice - and in the face of repeated denials from DWP - operate to intimidate claimants and seem to be designed to discourage them from claiming what is legally their right to claim, via sanctions, skewed assessments, deliberate misleading of claimants as to their rights, jobcentre targets for sanctioning, Work Programme, the list goes on. Viewed through this lens - and why shouldn't we? - the idea of staff from a Government department already legendary for its oppressiveness having the right to turn up at your door as and when they consider it acceptable to do so, with - apparently - no right on the claimant's part to any kind of privacy.
We can deconstruct all this to its component parts, and make it look quite reasonable - and that is no doubt exactly what the DWP will do, in between banging on about "helping people into work". But, taking the broad view, this seems to me to be another significant step in the direction of completely dehumanising benefits claimants, and regarding them as simply not entitled to any privacy, freedom, or dignity. While I can accept that there may be a debate to be had as far as whether some of those need to be sacrificed to some degree in the name of maintaining the integrity of the benefits system, it needs to be a fair, and nuanced debate: it's not simply enough to say "if you want the Government to support you, then all bets are off when it comes to treating you like a human being". That's just wrong.
And, even if you leave the moral argument out of it, the harsh reality is that if you treat people like scum, they will respond accordingly. There is no better way of ensuring that your claimant community become disempowered, hopeless, resentful, bitter, lazy and criminal than by treating them as such. And I defy anyone to try and claim that the DWP is doing anything other than treating them as such.