I have just finished a first read-through of the best article on usury I have ever seen published in the Catholic blogosphere, and I urge every Catholic truly concerned with the moral and theological implications of our presently-collapsing, usury-based global financial architecture, and the proper formation of our Catholic conscience on the matter, to read it.
I will have to think this one through several times, but I expect it will become an important source for me when- time permitting!- I am able to get back to the question of usury here at this blog.
The piece can be accessed here.
I agree completely that the teaching of "Vix Pervenit" remains the authoritative exercise of the magisterium on this question.
I question the legitimacy of interest applied to extrinsic titles, but Storck advances some source materials that require me to rethink this.