This is the problem: the body we need to fix house hoarding is comprised of house hoarders, who are financially invested in the current status quo, in protecting their own unearned capital gains, and ensuring they can continue to gain tax-free income (to add insult to injury, they get subsidised by a housing allowance for doing so). By any objective measure, they are deeply conflicted. I don't know how to fix it, but the continued toleration of this conflict and refusal to enact any solution undermines the integrity and legitimacy of parliament.