TheodoraKisses whilst I think the current spare bedroom situation is a bit daft, tackling it via a benefit reduction is utterly illogical. Doing it via housing policy would make more sense.
Without getting in to individual circumstances (disabilities etc), here's some figures for my city:
Newspaper reported recently that approximately 15,500 households each year need a one bedroom house/flat (I think this is the number on the council list waiting for a 1 bedroom)
Each year, 500 one bedroom properties become available...
Rent on a 2 bedroom council flat (many of which would be allocated to a single person under our housing policy) - £92 per week
LHA for a 1 bedroom private rent - £114.
So what's going to happen? People will either wind up paying for the "bedroom tax" whilst they wait for a very long time for an alternative social housing property. Or, they somehow manage to get a private let (if the find a LHA friendly landlord and can manage to beg/steal/borrow a deposit) and then end up claiming LHA at a HIGHER rate than they are currently receiving.