He will though: not financial backing, but time backing. They wont want to change managers. RM is a safe pair of hands. They know he can get his team to win games. They merely want to stay in the PL. That's it. Full stop. Change to someone else and they are into the unknown. They dont want that.
100% guaranteed: RM's job is safe for as long as he wants it.
Correct, Moyes would more than likely still be in charge because he tows the line they want.