The model's success will hinge in large part on the private providers securing sufficient housing stock to create something approximating a market. But that puts the focus straight back on state houses - and how much the Government will get from sales of such properties to those providers.
While making noises about getting "good value" for taxpayers, the Cabinet papers confirm that "almost certainly" the price the Government gets for its houses will be lower than the book value in its annual accounts.
Labour - or to be more exact the party's housing spokesman Phil Twyford - has understood the importance of keeping the focus firmly on the fate of state of housing.
That is not just because state house tenants are Labour voters. Or that the building of state houses has a unique place in Labour Party history.
It is because the status quo is simple and easily understood. And it has worked. By stressing those attributes, Twyford can exploit people's fears of the unknown by contrasting the safety of the status quo against something which has yet to prove its worth.
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