Mollie65.
Quite frankly, I don't care what anyone calls it! If the Government hadn't decided that it didn't sound good, they would have called it the Underoccupancy Charge. It certainly isn't a "removal of spare room subsidy", as no such subsidy has ever existed.
And to people on a low income, it isn't a "small" charge.
It is also a myth that this charge brings social housing into line with the private rented sector.
Firstly, when it was applied to the PRS, it was not done so retrospectively - in other words, it would only apply to you if / when you moved house!
This hasn't been the case in SH.
Secondly, if I understand it correctly, while the amount of HB you can receive in PRS is limited according to your "needs", if you can find a larger property that does not exceed that limit, you will not be penalised (please correct me if I'm wrong, anyone).
As for the overcrowding issue, that is surely a direct result of the failure over a long period of time to build enough homes. That same shortage of property is responsible for high rents, and those every-increasing rents are a big factor in the ever-increasing Housing Benefit budget.