At the outset, let me say that I am not an expert in any of these things. Also, this is a discussion of ideas, not a search for problems nor solutions.
All right, so J. K. Rowling is notorious (at least to me) for bringing up a lot of controversial topics and then proceeding to ignore them completely. (I’m looking at you House Elf Rights Activists!) One of her most interesting ideas was the goblin opinion on ownership. In the book, it is a small matter that acts primarily as a plot device regarding the sword of Gryffindor. Basically, the goblins want it back because they believe that ownership of any object belongs to its creator.