If it makes you feel better then yep, I haven't studied economics... but as I understood it, top end materia and hq crafted goods were much cheaper on legacy worlds than new ones, due to the larger supply pool coming over from 1.0. I might take a peek again, but certainly seemed to be that way last time I looked.
All my original post said was that I believe SE are trying to use the housing pricing differences to bring the amounts of gil in each economy closer together, as a pre-cursor to opening up world transfers from legacy to non-legacy. Particularly as Yoshi quoted non-legacy servers as the target for the deprecation. You disagree, and think it is completely unrelated. That's fine, we can have different opinions. What do you think the reason they restrict world transfer is then?