The noble Lord makes a very powerful point. With any new system—or indeed with very mature systems, such as housing benefit—there are huge risks of error and cost in correcting it. I have run a housing benefit system and know just how easy it is to run into difficulties with it. I also know how costly it is to run because of the complexity of individual circumstances. We are here creating a whole new parallel system of assessment that sits alongside those for universal credit, housing benefit and so on. It will be new, and we will not establish a lot of the detail until we have run it. That, by the way, is why I still feel strongly that a pilot to test the operation of the system would be very valuable, not least because it would tell us how much cost is involved and what are the potential error rates.
It is essential, first, that we recognise that this may not be worth doing nationally, and certainly not locally. Secondly, we must give comfort in the Bill to local authorities that their costs will be covered. Thirdly, we must recognise that if this is to be a genuinely fair system, it will come with complexity and significant cost.