Amanda, I didn't mean that to come across as snidey, sorry if it did :)
What I meant was, so many things in life are non-negotiable - school, family holiday, going to Grandma's on her birthday, family day out planned for months, so many things, it's very easy to end up rewarding for doing these things, which then becomes a case of the child demanding better rewards for these necessary things, which then looks like the child is ruling the roost.
I know because my life is a constant battle of trying to find out where reward ends and bribery starts, and watching for signs that the dear child is starting to take advantage of me again
Bribery can be a sign of weak parenting, but I believe it often shows desperation on the parent's part, who really don't know what to do about very difficult behaviour.
Something I find a lot on MN is that so many posters judge all children on a level, and don't take into account that all dc have their own personalities and foibles. Some children are naturally very easy, some are awkward little buggers and need so much more input to become decent human beings.