I fully agree with your first paragraph. 

Re the second paragraph, may I suggest that it is not the "organisation" that calls all of  us to become better (images and likenesses of Christ). It is Christ who calls us, in our baptism. But that does not mean that the 'organisation' should not strive to become better as well. Once again, I agree with you there. 

It is not structures that need to change but those making up the structures. In a predominantly horizontal (democratic) society like North America, crime, corruption, abuse (all kinds), etc. is well and alive (and prisons are full). No matter how much you change structures, people will find ways to abuse them, unless they don't want to do so. This, of course requires personal resolve (conversion). That, i think is the real change, and what ultimately matters.