Notalottery Jeremy Hunt was asked about this on Today. He said the Cons had decided Dilnot proposal was not fair because people with houses worth £1-2kmn would not have to pay their eg £200k care costs because of the Dilnot cap and the taxpayer pays them instead.
Obviously there wasn't the time for a philosophical discussion on Today! but it does raise the question why someone with a house worth £2mn doesn't have to pay NHS costs, or costs of state education, for instance.
On a more practical level, anyone with cash savings of £23k was already paying for domiciliary care. I know there is an asset rich, income poor segment, but I do wonder how many people with a house worth £2mn has less than £23k in savings and is under the income threshold. I suspect they were mostly paying anyway. Maybe I am wrong!