The Catholic social doctrine of subsidiarity emphasizes keeping control and decisions at the most local level possible. Therefore liberties at the level of the individual, the family and the church should be maximized. Religious liberties should be fully affirmed while the role of civil governments should be somewhat restrained.
The Catholic social doctrine of solidarity emphasizes issues of social justice in areas like criminal justice, eradicating poverty, healthcare, education, etc.
Similarly, political conservatives emphasize individual liberties and reducing the size and scope of civil government. Where necessary, city, county, state governments in the USA should ideally have more relative control while the federal government (and international organizations) should have a more limited role.
Similarly, political liberals seems ready to address all the social issues but often want to do through the means of civil government programs at the higher levels of civil government and de-emphasize the roles and responsibilities of individuals, the family and the Church.
It seems good to address to social justice issues and good to maximize localized liberties while minimizing centralized tyrannies.
Why does it have to be one or the other? Why such polarization and extremes? Why not utilize the best of both from the Catholic social doctrines of subsidiarity and solidarity?