I quite like this idea from a representative perspective but it could well make things more unstable. Majorities could be lost and gained every year and so a change of government every year.
While I agree we need more housing it needs doing in a controlled way and jointly with policies to create wealth. Your plan as it stands would leave millions of people in negative equity traps ..... welcome back to the 80s.
I'm another PM that would immediately remove us from the EU.