Welfare Reform Bill

Throughout this debate, we have seen a game played out by the Opposition: on the one hand they are in favour but then they vote against everything. I cannot understand why, if the right hon. Gentleman takes this principled position and if Labour has believed in it for a while, he has not previously advanced this amendment, which he apparently believes so passionately now needs advancing? Why not in the Lords? Why not here before? There is no answer except that he is trying to indicate one thing and run away with the other.