Since Thatcher sold all those houses the entire country owned, to a lucky generation with spare cash, why not have the government set up a pension-like scheme where you can sign up to a secured mortgage that recoups funds to build affordable housing for the next generation.
They only provide the help to buy – ie a loan to get a loan. hmm
As far as I know the UK Govt don’t provide loans or mortgages to help you buy a house – however, they do have a scheme that helps you raise money for a deposit. From there you are at the whim of the private sector with its rates and risks.