I doubt it.
His product seems to be a mortgage where the balance owed is reduced if the house value drops. (There are similarities to 'no recourse' mortgages available in the US)
While the product is nice for the house buyer what incentive is there for the lenders? They will just charge more for the large risk they're taking. The lenders would be exposed to the property market, and corrupt politics etc.
There's also a problem with valuing houses... we have no house price database despite calls for decades and promises made and broken. So it's unworkable until there is a house price database,.. or professional valuers,..