How has that person gained that house of half a million? It's possible that it's hard work and wealth creation, it may be that they bought a house in London which has exploded in price or it may be that they are a Made In Chelsea type who has inherited it from their parents.

However, this policy for funding increase seems a far harsher line than the (Tory cut) inheritance tax - the wealthy ill paying up while the wealthy healthy not doing so.