I wanted to believe your last paragraph might be the explanation, but having seen how other policies have gone, I was pretty sure it wasn't the case. Having now seen Clegg being quoted in favour of this, it's clear we're being sold down the river yet again.

Of course, what might happen is that there'll be all sorts of rage from the membership and Clegg et al will come back and say that the proposals have changed, they've had some Very Real Concessions (now the police will have to knock before kicking down your door in the middle of the night) and they'll vote for the proposals while chorusing 'but Labour would have done worse...'