That has never been the goal, it's not the goal of ANY of the major political parties because it would be political suicide.
For housing to be affordable, current house prices would have to drop significantly, which would means loses in the hundreds of thousands of dollars for most home owners, and 65% of the current residential properties are owned by the family that live in them (the majority of voters)
I, for one, would not mind if my property value stagnated or decreased so that others could have a better life.
But I'm not most people, nor am I in a decision-making capacity.
It's also worth saying that I live in a single family dwelling on a larger than normal city lot, so I recognize that I am a part of the problem and still wouldn't want to change the way I live.