Social housing can never be the true solution. The government doesn't have enough money to make it have an impact. Even in cities in Europe that have 30-40% social housing, they are still having housing crisis situations where people can't move, people wait years to affordable units, and private housing is still astronomically expensive.
There is a proper fix, but it destroys almost all of the equity in the existing housing market which means voters will never go for it. Far too many people still own houses and would lose hundreds of thousands or even millions.
So instead we get this pandering shit, and prices will continue to rise for the next few decades.