Part of the problem is government regulation. In some places, it's almost impossible to build new houses due to regulations. Some portion of the population wants to see house prices continue to increase and they will vote for politicians who will implement policies which will support that agenda. Of course this happens at the expense of another, also large portion of the population who do not own a house and have to…
The issue is not supply and demand for houses - there are plenty enough to go around (though often in the wrong place). The issue is that a sizeable underclass is being created that have no wealth, not least because what wealth they did have has been funnelled to the very wealthy. For example, medical bills. For example student loans. For example zero interest rates with zero wage inflation meaning accommodation cost…
Housing markets are local. Their supply and demand dynamics are local. Affordable housing in Kentucky does not help people in San Francisco or Seattle unless everyone can telework.
Unaffordable housing is a major contributor to inability to build wealth. In most cases it’s no high paying jobs or unaffordable housing, pick one.