So, first off we need to understands how Remnant works. Remnant, as we know from novels, is human emotions and intentions spread into items. Remnant works through the Zero-Point Field, as we know from Fazbear Frights story "Fetch", where it was talked about it and schools had random number generator, and scholar must think about some number, like 0, and that number will appear more.

In Frights Fazbear Entertainment experimented with Agony, Remnant's dark side. In Tales things such as in Frights happen, and Tales are 100% canon to games, so they most likely experiment with them in games. Now, who will have so much power and influence to hide all that? I only think that the goverment!

Schools know about the Zero-Point Field, so US goverment (since few restaurants were build in USA, and also animatronic pizzeria's are US thing) also knows about them, and also likely Remnant.

MatPat theorized about Ms. Afton getting all rights to the company and logs of Afton's experiments with Remnant and Agony, and trying to use them to rebuild her family. So what if she went to US goverment to help her with her goal in exchange for valuable information which literally breaks fabric of reality, and now Fazbear Entertainment is being used as a front to experiment with Remnant and Agony?

I also think that US goverment uses Glitchtrap virus in order to control Fazbear Entertainment's workers, since few Frights and Tales stories hinted that Fazbear Entertainment workers don't do it at their own, or are forced to do it, such as Gumdrop Angel (I hate that story).

BUT HEY, IT'S JUST A THEORY, A VIDEO-GAME POLITICS CONSPIRACY THEORY!!!!!!