I've just been watching Countryfile, which visited a massive estate that had fallen into ruin over many years. As the private sector were incapable of repairing it the public sector stepped into to do so.
The multimillion pound project is being funded from the proceeds of a single grant from the local authority, established as a Trust which will carry out the repairs and ensure that the property remains in good condition for ever more.
If public funds can be used this way to keep a former Lord's Estate from crumbling into the earth then surely it can be used to build new Housing Estates for people to live in affordably.
As such a mechanism is not new, experimental, or dangerous, why on earth is it not being used?