Addressing the housing crisis is not something any politician will ever do in this country - our whole economy is based on inflated house/land values, if they allow enough development to happen all their chums sitting on massive land banks will not be happy.
Even your average OCUK tory will be unhappy seeing their buy to let portfolios reduce in yield
It's absolutely nothing to do with immigration levels.
+ population growth (driven in part by immigration) increasing growth rates.
Unless we change the system governments will still be wanting house prices to rise and immigration driven growth rates.