I have a that they would struggle to fill if I left.
I am the only one that does my job in the team, and the only one actually trained to do it as well.
There is no back up. I work 6am-2pm
Senior staff want me to work 8am-4pm instead
Senior staff tried and tried to get me to change shift. Grumbling and complaining about it (them not me)
Told them that the mortgage is paid of and my other half is the main bread winner and I can just walk away if they like.
The change of my shift has never been mentioned again.