Actually, all policies are under the purview of the church...the church has and should have a say in them.
For example, the church in Germany should have been speaking out against the economic policies of the the socialist NAZI regime...that they weren't more muscular on that was a problem.
I personally have a wait and see attitude about this pope. I remember the hoopla when Benedict took over. That didn't amount to much IMO.
Perhaps I should be more careful in my wording: The values which construct economic policies are the purview of the Church, but the Catholic Church claims for itself an authority for doctrinal theology which it lacks in economics. Pope Francis promotes the values of freedom and compassion towards the poor, or, in more distinctly Catholic socioeconomic terms, subsidiarity and solidarity. The means to achieve those values requires an openness to the secular sciences, such as economics.
This displays an appalling historical ignorance. There were members of the Church who complied (there are always collaborators, unfortunately) but by and large the Church held firm and many of Her clergy and laypeople suffered greatly in the concentration camps for it!