I’m in a high paying job, I’m bored out of my skull, but if I move I’ll lose a third of  my salary. What do I do?

The question is why are you bored? If you’re well paid and important to your company, there must be a way to challenge yourself. Ever think of asking your boss, “Hey Mick, I’m bored out of my skull, any chance of something new being thrown my way?” That’s normally a good start. If that fails then you get drastic.