If I was contracted to work somewhere and the bout agreement had NV on it, I'm not just moving over to CA where 9% of my earnings have to go to the government. The UFC should finance the difference and the fighters should invoice them for it.
It's like telling me that I have to work from another office next week in London, then 4 days out telling me that it's in Paris and expecting me to pay for my own Eurostar train ticket, meals and travel for my wife which I'm bringing along with me. Either, I'm not going and you're still paying me my rate, or I'm going and you're reimbursing the difference.
These fighters get thrown about and don't do a thing, then pay "managers" a %. What do these managers and teams actually do? Do they just get paid to stand around?