Originally Posted by
Deathhappens
...You guys were joking, right?
OT, there really aren't any good solutions based on what we know about Magecraft currently (which could change tomorrow as long as Nasu feels like it). Mystery is a strictly limited resource, the more people out there have even a fragment of it the less each individual has overall. And given that muggles "passively" diminish it with their science and inquiry and stuff, the only way to redistribute more Mystery to fewer individuals is for there to be fewer humans in the world in total.
That, or someone with access to reality-warping powers can fundamentally alter the nature of Mystery to make it go infinite or something. I dunno, try bonking Shiki over the head and then asking [ ] really nicely.