I cant see the affordable housing being scrapped but maybe reformed, there
will always be a catagory of people who have a housing need and cannot afford to purchase a house on the open market.
I think its fair enough for a local authority to sell "Affordable" units on the open market providing they cannot sell them through their own data base of applicants.
I personally think the term of the claw back it way too high, maybe if they reduced the term to ten years with your percentage reducing after 5 years it might be more attractive for perspective applicants.